----------------------------------------------------------------
Another appearance by Tim Gallagher on NPR last week re-telling his quest for the Imperial Woodpecker in Mexico:
http://www.npr.org/2011/12/23/144190097/searching-for-a-ghost-bird?ft=1&f=1007
As most active birders out there have by now heard, some weeks ago a Hooded Crane (Asian species) was discovered co-mingling with Sandhill Cranes in Tennessee:
http://www.nooga.com/26489_rare-bird-wanders-around-the-world-to-southeast-tennessee/
http://www.chattanoogan.com/articles/article_215970.asp
Obviously one wonders how an exotic large bird ended up plopped down in the corner of Tennessee having not been spotted anywhere along the way of whatever route it took to get there? Given that on any given day (or week, or month) very very very very very very very very very little of this country actually gets birded to any significant extant it's not entirely unexpected. At any given point in time there are probably 100's of rarities scattered across the country going unreported (granted, not all as rare as a species potentially from halfway around the globe).
Many presume this apparently non-banded, non-pinioned Tennessee bird is nonetheless an escapee from a holding facility (a few escaped in Idaho back in 2006), but even if that is the case the question remains how such a large distinguishable bird has managed to evade detection so much of its time (there being just two other sightings of Hooded Crane in US since those escapes)? But then maybe spotting a single Hooded Crane in a forest of Sandhills ain't so easy (or probabilistic), especially in out-of-the-way places.
Finally, a reader sends me a positive note about Daniel Kahneman's new book "Thinking, Fast and Slow," and what it may have to say about the Ivory-billed debate. This long-awaited volume has received outstanding reviews (including making it onto every 'Top 10 non-fiction booklist of 2011' I've seen), and Kahneman is regarded by many as one of the most important research psychologists of modern times (interestingly, he won his Nobel Prize in economics). I suspect his views can actually be used to cut both ways in the Ivory-bill dispute, but I haven't read the book yet (hopefully sometime in 2012):
http://www.ft.com/cms/s/2/15bb6522-04ac-11e1-91d9-00144feabdc0.html#axzz1dhq0hJbY
-----------------------------------------------------------------------------------
Monday, December 26, 2011
Thursday, December 15, 2011
-- The Unknown... --
-----------------------------------------------------------------
Major ho
axes have, luckily, been few-and-far-between in the Ivory-bill saga, though they have occurred, and may again. Steve Sheridan's 2009 hoax was the one well-established (admitted) hoax of recent times, and most presume the Dan Rainsong and Florida "magic guy" (William Smith) story-lines to have also been hoaxes (though never admitted). A few folks may yet believe David Kulivan's 1999 claims to have been bogus, though almost all informed folks lean toward either honest mistake or true sighting for that one.
In earlier years of this blog I occasionally had transparent, bumbling hoaxes sent to me via email. Most were lame attempts, easy to see through, even if it takes extra effort to confirm them as concocted. Most who contrive such stories simply lack the knowledge/skills to pull it off, especially with today's means of scrutiny. Still, I've always believed that a well-executed, difficult-to-unravel hoax is possible by someone ornithologically and technologically knowledgeable enough, and with the patience/desire to do so.
It's barely even relevant to the question of whether Ivory-bills persist today, but possibly the most contested hoax/no hoax(?) case is that of Fielding Lewis's tale from 1971. Tim Gallagher detailed the unresolved story in his book "The Grail Bird" (Chapter 7, entitled "The Boxer"); available for free on the Web from Google books:
http://books.google.com/books?id=LVFoNP3LclgC&printsec=frontcover#v=onepage&q&f=false
Over the years a few folks who either had direct knowledge of the story or knew Lewis personally, have emailed me to voice its authenticity or Lewis's veracity… still, I've never felt confident taking either side on this one --- leaning toward authenticity, but only by a slim margin. [ -- For anyone not acquainted with the storyline, Lewis, a prominent Louisiana outdoorsman, presented George Lowery, one of Louisiana's premier ornithologists, with photos of an Ivory-billed Woodpecker on a tree trunk taken near Franklin, La. with a Brownie instant camera. The bird pictured IS clearly an Ivory-bill, the only question never resolved being whether it was living or a stuffed specimen placed on the tree.] One of the Lewis photos was used in a 2001 edition of "Birding" magazine, opening an article by Jim Williams:
http://tinyurl.com/7vr7fxp
It is amazing that even this instance of clearcut photos only takes us down yet another 40-year dead-end of unsettled controversy. Was the bird dead or alive, breathing or stuffed? Only Fielding Lewis knew for sure, and in the realm of the Ivory-bill, one witness is never enough (Lewis died in 2008; Lowery, by the way, died 30 years earlier, his reputation sullied by his trust in Lewis's claim).
Often people will ask what possible motive could Lewis have had for such a prank, if that it be, but the motivations of hoaxers can be many, and need not include money, material gain, nor fame. So I don't doubt that he could've had a motive, but to his death Lewis never recanted his claims (and, so far as I know, no further relics/evidence either backing or detracting from his story were unveiled following his demise).
Like the Luneau video, different people can view the Lewis photos and interpret them differently. Did a Brownie camera in 1971 accomplish what 1000's of dollars-worth of photographic equipment since then has failed to accomplish? Ultimately, in regards to the question of Ivory-bill persistence today, it is a somewhat moot point whether or not Lewis photographed an IBWO 40 years ago. Still, one wishes the Lewis story could be laid to rest, one way or the other, once-and-for-all… but like the Kulivan claims, the Sparling-Gallagher-Harrison claims, Tyler Hicks' report, etc. etc., apparently it cannot. It remains in the over-flowing dustbin of the curious, the tantalizing, the frustrating, the aggravating, the likely forever-unknown, that so enshroud this ornithological quagmire.
----------------------------------------------------------------
"There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don't know we don't know." ....Donald Rumsfeld
Major ho
axes have, luckily, been few-and-far-between in the Ivory-bill saga, though they have occurred, and may again. Steve Sheridan's 2009 hoax was the one well-established (admitted) hoax of recent times, and most presume the Dan Rainsong and Florida "magic guy" (William Smith) story-lines to have also been hoaxes (though never admitted). A few folks may yet believe David Kulivan's 1999 claims to have been bogus, though almost all informed folks lean toward either honest mistake or true sighting for that one.In earlier years of this blog I occasionally had transparent, bumbling hoaxes sent to me via email. Most were lame attempts, easy to see through, even if it takes extra effort to confirm them as concocted. Most who contrive such stories simply lack the knowledge/skills to pull it off, especially with today's means of scrutiny. Still, I've always believed that a well-executed, difficult-to-unravel hoax is possible by someone ornithologically and technologically knowledgeable enough, and with the patience/desire to do so.
It's barely even relevant to the question of whether Ivory-bills persist today, but possibly the most contested hoax/no hoax(?) case is that of Fielding Lewis's tale from 1971. Tim Gallagher detailed the unresolved story in his book "The Grail Bird" (Chapter 7, entitled "The Boxer"); available for free on the Web from Google books:
http://books.google.com/books?id=LVFoNP3LclgC&printsec=frontcover#v=onepage&q&f=false
Over the years a few folks who either had direct knowledge of the story or knew Lewis personally, have emailed me to voice its authenticity or Lewis's veracity… still, I've never felt confident taking either side on this one --- leaning toward authenticity, but only by a slim margin. [ -- For anyone not acquainted with the storyline, Lewis, a prominent Louisiana outdoorsman, presented George Lowery, one of Louisiana's premier ornithologists, with photos of an Ivory-billed Woodpecker on a tree trunk taken near Franklin, La. with a Brownie instant camera. The bird pictured IS clearly an Ivory-bill, the only question never resolved being whether it was living or a stuffed specimen placed on the tree.] One of the Lewis photos was used in a 2001 edition of "Birding" magazine, opening an article by Jim Williams:
http://tinyurl.com/7vr7fxp
It is amazing that even this instance of clearcut photos only takes us down yet another 40-year dead-end of unsettled controversy. Was the bird dead or alive, breathing or stuffed? Only Fielding Lewis knew for sure, and in the realm of the Ivory-bill, one witness is never enough (Lewis died in 2008; Lowery, by the way, died 30 years earlier, his reputation sullied by his trust in Lewis's claim).
Often people will ask what possible motive could Lewis have had for such a prank, if that it be, but the motivations of hoaxers can be many, and need not include money, material gain, nor fame. So I don't doubt that he could've had a motive, but to his death Lewis never recanted his claims (and, so far as I know, no further relics/evidence either backing or detracting from his story were unveiled following his demise).
Like the Luneau video, different people can view the Lewis photos and interpret them differently. Did a Brownie camera in 1971 accomplish what 1000's of dollars-worth of photographic equipment since then has failed to accomplish? Ultimately, in regards to the question of Ivory-bill persistence today, it is a somewhat moot point whether or not Lewis photographed an IBWO 40 years ago. Still, one wishes the Lewis story could be laid to rest, one way or the other, once-and-for-all… but like the Kulivan claims, the Sparling-Gallagher-Harrison claims, Tyler Hicks' report, etc. etc., apparently it cannot. It remains in the over-flowing dustbin of the curious, the tantalizing, the frustrating, the aggravating, the likely forever-unknown, that so enshroud this ornithological quagmire.
----------------------------------------------------------------
Monday, December 12, 2011
-- Can the Ivory-bill Be Far Behind? ;-) --
-----------------------------------------------------------------
As on
e website says, "By all indications, Tuesday is going to be a big day." ...For physics that is, not ornithology. Tomorrow, according to well-circulated rumors, CERN will claim evidence that the elusive Higgs boson has been found.
In honor of that likely pronouncement, I repeat below (only slightly modified) a post I did earlier this year:
The analogy to 'Schrodinger's cat' has been made repeatedly in the case of the Ivory-billed Woodpe
cker. Another, more-current analogy one might make though is to the Higgs boson. I'm not competent to describe the technicalities of the Higgs, but simply put, years and years of tangential evidence has indicated its likely existence, yet no proof of it has been forthcoming -- one of the major goals of the much-publicized Large Hadron Collider is to establish the presence of this elementary particle (known popularly as "the God particle"... hmmm, echoes of "the Lord God Bird"). Both the LHC and its rival, the Tevatron collider in the US, have recently found rumored evidence (still being analyzed) for the Higgs, after decades of theorizing and failed searches. Hints, glimpses, findings, calculations, debates... but still awaiting proof (sound familiar?).
I'll confess my bias: Schrodinger's cat is mostly an abstract thought exercise... I suppose I prefer an analogy to the Higgs, because so many of those in the know feel sure it is really there, and just a matter of time before that is patiently demonstrated... may it still be so for the Ivory-bill... not Schrodinger's Woodpecker, but Higgs.
Of course, any announcement from CERN will have no real bearing on the Ivory-billed Woodpecker. Still… one may hope.
Apologies to any who are bored with all the Higgs hoopla, but a quick update:
Higgs rumors had been circulating for weeks on popular science sites with the hype feeding on itself in increasing anticipation of today's announcement. And while some do find today's news release quite persuasive, the bottom-line is more cautious, continuing to take a wait-and-see approach (for something more definitive)… in a sense, physicists have heard some double-knocks and kent sounds and had a brief glance of a putative Higgs, but nothing that can be called "proof." They're now predicting 2012 as the year that final confirmation may come --- uhhh, how 'bout we make that a twofer!
-----------------------------------------------------------------
As on
e website says, "By all indications, Tuesday is going to be a big day." ...For physics that is, not ornithology. Tomorrow, according to well-circulated rumors, CERN will claim evidence that the elusive Higgs boson has been found.In honor of that likely pronouncement, I repeat below (only slightly modified) a post I did earlier this year:
The analogy to 'Schrodinger's cat' has been made repeatedly in the case of the Ivory-billed Woodpe
cker. Another, more-current analogy one might make though is to the Higgs boson. I'm not competent to describe the technicalities of the Higgs, but simply put, years and years of tangential evidence has indicated its likely existence, yet no proof of it has been forthcoming -- one of the major goals of the much-publicized Large Hadron Collider is to establish the presence of this elementary particle (known popularly as "the God particle"... hmmm, echoes of "the Lord God Bird"). Both the LHC and its rival, the Tevatron collider in the US, have recently found rumored evidence (still being analyzed) for the Higgs, after decades of theorizing and failed searches. Hints, glimpses, findings, calculations, debates... but still awaiting proof (sound familiar?).I'll confess my bias: Schrodinger's cat is mostly an abstract thought exercise... I suppose I prefer an analogy to the Higgs, because so many of those in the know feel sure it is really there, and just a matter of time before that is patiently demonstrated... may it still be so for the Ivory-bill... not Schrodinger's Woodpecker, but Higgs.
Of course, any announcement from CERN will have no real bearing on the Ivory-billed Woodpecker. Still… one may hope.
Apologies to any who are bored with all the Higgs hoopla, but a quick update:
Higgs rumors had been circulating for weeks on popular science sites with the hype feeding on itself in increasing anticipation of today's announcement. And while some do find today's news release quite persuasive, the bottom-line is more cautious, continuing to take a wait-and-see approach (for something more definitive)… in a sense, physicists have heard some double-knocks and kent sounds and had a brief glance of a putative Higgs, but nothing that can be called "proof." They're now predicting 2012 as the year that final confirmation may come --- uhhh, how 'bout we make that a twofer!
-----------------------------------------------------------------
Friday, December 09, 2011
-- Weekend Reading --
------------------------------------------------------------------
This long, older, Jack Hitt piece from the NY Times is possibly worth a re-read:
http://www.nytimes.com/2006/05/07/magazine/07woodpecker.html?pagewanted=all
And the Don Moser 1972 Life Magazine write-up on the Ivory-bill, which is alluded to in the article, is available on the Web from Google books here (starts pg. 52):
http://tinyurl.com/7mznd3q
------------------------------------------------------------------
This long, older, Jack Hitt piece from the NY Times is possibly worth a re-read:
http://www.nytimes.com/2006/05/07/magazine/07woodpecker.html?pagewanted=all
And the Don Moser 1972 Life Magazine write-up on the Ivory-bill, which is alluded to in the article, is available on the Web from Google books here (starts pg. 52):
http://tinyurl.com/7mznd3q
------------------------------------------------------------------
Sunday, December 04, 2011
-- And Back to the Pearl --
----------------------------------------------------------------
In his somewhat trademark fashion, Mike Collins has once more re-visited some prior video footage (in this instance from the Choctawhatchee in 2007), to again discover the possible presence of Ivory-billed Woodpeckers. Read his report here:
http://www.fishcrow.com/choc19jan07.html
Per usual, the video is not of a nature/quality that would sway any skeptics nor move the debate -- it's not clear to me if Mike seriously thinks this quality of 'evidence' would alter mindsets. And it is almost embarrassing that he keeps pushing such footage on the Frontiers of Identification listserv where most participants are likely to roll their eyes at it (...at the Frontiers site it is not unusual to have a vigorous debate over the identity of a bird even when given perfectly good and clear photographs!... which Mike's frames are not).
There are, as usual, some frames I find mildly interesting, but nothing at all persuasive to my eyes overall. A nice-sounding double-knock is included in one video, though I have certain qualms with it as well, which are probably unresolvable and not worth getting into. Still, I do encourage anyone with the patience left to do so, to slowly, methodically work through the various clips for anything you can glean from them (...though it may not be much). I suspect the clips viewers might find most interesting are those labelled, "climb knock.mp4" and "jasa_movie1mp4".
For sheer perseverance, perhaps no one deserves the glory of eventually documenting the Ivory-bill any more than Mike does; plus, he has the luxury, afforded to few, of a job that allows him more consistent time and opportunity to look for the species in viable habitat. And if he is ever able to obtain video of a quality that confirms the presence of Ivory-bills in the Pearl to everyone's satisfaction, Mike will, in a flash, become one of the most celebrated, renowned birders in the long history of American ornithology (his various techniques, likely to become standard fare in graduate textbooks)… but, unless or until that happens, the verdict on his work seems, alas, far less promising...
For any who may be relatively new to the IBWO saga, and unaware of some of the history for the Pearl River area, preceding Mike's claims, here are a few older background pieces focusing mainly on David Kulivan's story or the Zeiss search that followed it in 2002 (unfortunately, so far as I can tell, the official Zeiss summary pages for their 2002 search are no longer available on the Web -- hmmm, is this because Zeiss now finds it too embarrassing to be associated with IBWO searches, or what gives???):
http://www.northlakenature.org/CurrentEvents/Ivory-BilledWoodPecker.html
http://articles.latimes.com/2000/nov/19/news/mn-54363
http://www.wildlifewatchers.org/esReports/report29.html
http://tinyurl.com/6psreko
http://www.birds.cornell.edu/Publications/Birdscope/Summer2002/ivory_bill_absent.html
...and finally, brief, general info about the Pearl River WMA here:
http://www.wlf.louisiana.gov/wma/2789
[Pearl River area pic above via Wikimedia Commons]
----------------------------------------------------------------
In his somewhat trademark fashion, Mike Collins has once more re-visited some prior video footage (in this instance from the Choctawhatchee in 2007), to again discover the possible presence of Ivory-billed Woodpeckers. Read his report here:
http://www.fishcrow.com/choc19jan07.html
Per usual, the video is not of a nature/quality that would sway any skeptics nor move the debate -- it's not clear to me if Mike seriously thinks this quality of 'evidence' would alter mindsets. And it is almost embarrassing that he keeps pushing such footage on the Frontiers of Identification listserv where most participants are likely to roll their eyes at it (...at the Frontiers site it is not unusual to have a vigorous debate over the identity of a bird even when given perfectly good and clear photographs!... which Mike's frames are not).
There are, as usual, some frames I find mildly interesting, but nothing at all persuasive to my eyes overall. A nice-sounding double-knock is included in one video, though I have certain qualms with it as well, which are probably unresolvable and not worth getting into. Still, I do encourage anyone with the patience left to do so, to slowly, methodically work through the various clips for anything you can glean from them (...though it may not be much). I suspect the clips viewers might find most interesting are those labelled, "climb knock.mp4" and "jasa_movie1mp4".
For sheer perseverance, perhaps no one deserves the glory of eventually documenting the Ivory-bill any more than Mike does; plus, he has the luxury, afforded to few, of a job that allows him more consistent time and opportunity to look for the species in viable habitat. And if he is ever able to obtain video of a quality that confirms the presence of Ivory-bills in the Pearl to everyone's satisfaction, Mike will, in a flash, become one of the most celebrated, renowned birders in the long history of American ornithology (his various techniques, likely to become standard fare in graduate textbooks)… but, unless or until that happens, the verdict on his work seems, alas, far less promising...
For any who may be relatively new to the IBWO saga, and unaware of some of the history for the Pearl River area, preceding Mike's claims, here are a few older background pieces focusing mainly on David Kulivan's story or the Zeiss search that followed it in 2002 (unfortunately, so far as I can tell, the official Zeiss summary pages for their 2002 search are no longer available on the Web -- hmmm, is this because Zeiss now finds it too embarrassing to be associated with IBWO searches, or what gives???):
http://www.northlakenature.org/CurrentEvents/Ivory-BilledWoodPecker.html
http://articles.latimes.com/2000/nov/19/news/mn-54363
http://www.wildlifewatchers.org/esReports/report29.html
http://tinyurl.com/6psreko
http://www.birds.cornell.edu/Publications/Birdscope/Summer2002/ivory_bill_absent.html
...and finally, brief, general info about the Pearl River WMA here:
http://www.wlf.louisiana.gov/wma/2789
[Pearl River area pic above via Wikimedia Commons]
----------------------------------------------------------------
Sunday, November 27, 2011
-- Back to the Carolinas --
----------------------------------------------------------------
In a recent post Ralph Perrine reports he will be searching for the Ivory-bill in the southeast corner of N. Carolina later this winter. An earlier search there by 2 technicians from North Carolina Audubon, primarily of the Waccamaw/Green Swamp area, unfortunately found no evidence for the presence of Ivory-bills.
Perrine's post links to a nice, detailed account of 'field notes' on the IBWO from Arthur Allen and Paul Kellogg, pre-Tanner's study. (It mostly duplicates info from Bent and other Allen writings as well as Tanner's later work, but also includes some additional details.):
http://elibrary.unm.edu/sora/Auk/v054n02/p0164-p0184.pdf
BTW, Perrine has a few other blog posts related to the Ivory-bill here:
http://www.ralphperrine.com/blog/category/ivory-billed-woodpecker/
Over the holiday weekend I also got to be regaled with a few more details of one of the previous sightings from the search in the Congaree of S. Carolina.
Sometimes it just seems like we're moving in never-ending circles, though..... (sigh)
---------------------------------------------------------------
In a recent post Ralph Perrine reports he will be searching for the Ivory-bill in the southeast corner of N. Carolina later this winter. An earlier search there by 2 technicians from North Carolina Audubon, primarily of the Waccamaw/Green Swamp area, unfortunately found no evidence for the presence of Ivory-bills.
Perrine's post links to a nice, detailed account of 'field notes' on the IBWO from Arthur Allen and Paul Kellogg, pre-Tanner's study. (It mostly duplicates info from Bent and other Allen writings as well as Tanner's later work, but also includes some additional details.):
http://elibrary.unm.edu/sora/Auk/v054n02/p0164-p0184.pdf
BTW, Perrine has a few other blog posts related to the Ivory-bill here:
http://www.ralphperrine.com/blog/category/ivory-billed-woodpecker/
Over the holiday weekend I also got to be regaled with a few more details of one of the previous sightings from the search in the Congaree of S. Carolina.
Sometimes it just seems like we're moving in never-ending circles, though..... (sigh)
---------------------------------------------------------------
Wednesday, November 23, 2011
-- Thanksgiving 2011 --
----------------------------------------------------------------
In some prior years I've posted a Top 10 list of things I'm thankful for around Thanksgiving. At the last minute I decided to do one for this year:
1) The O
ccupy movement and what it represents
2) Apple Computer and Steve Jobs' inspiring legacy
3) Taylor Swift ('cuz her music never fails to perk me up)
4) All those working on behalf of conservation in spite of the obstacles
5) the plethora of bird blogs and websites that have augmented the hobby of birding, taking it to a whole new level
6) Bill Pulliam's independence of thought and approach
7) Childhood intuition (may you never lose it)
8) Owls, raptors, Pileated Woodpeckers, hummingbirds, penguins, parrots, and other species that never fail to make my day
9) Mike Collins' persistent doggedness
10) Crocs (the shoes, not the reptiles)
In this economy, I should probably also mention having a job and a paycheck, as well (…at least for now)!
A Happy Holiday to all the readers here!
( photo of 3 turkeys via Wikimedia Commons ;-)) )
----------------------------------------------------------------
In some prior years I've posted a Top 10 list of things I'm thankful for around Thanksgiving. At the last minute I decided to do one for this year:
1) The O
ccupy movement and what it represents2) Apple Computer and Steve Jobs' inspiring legacy
3) Taylor Swift ('cuz her music never fails to perk me up)
4) All those working on behalf of conservation in spite of the obstacles
5) the plethora of bird blogs and websites that have augmented the hobby of birding, taking it to a whole new level
6) Bill Pulliam's independence of thought and approach
7) Childhood intuition (may you never lose it)
8) Owls, raptors, Pileated Woodpeckers, hummingbirds, penguins, parrots, and other species that never fail to make my day
9) Mike Collins' persistent doggedness
10) Crocs (the shoes, not the reptiles)
In this economy, I should probably also mention having a job and a paycheck, as well (…at least for now)!
A Happy Holiday to all the readers here!
( photo of 3 turkeys via Wikimedia Commons ;-)) )
----------------------------------------------------------------
Sunday, November 20, 2011
-- And So It Goes… --
-----------------------------------------------------------------
The latest issue of Birding Magazine from ABA includes a report from their official Checklist Committee, including the unsurprising decision that the Ivory-billed Woodpecker is not included on the current checklist, remaining instead a Code 6 bird, meaning probably or definitely extinct. The article is available in pdf form here:
http://www.aba.org/birding/v43n6p26.pdf
Meanwhile, Cornell has uploaded a wonderful piece (~11 mins.) with Chris Saker and Martjan Lammertink on the use of a man-made "double-knocker" box to research the Pale-billed Woodpecker in Costa Rica. Although this was only uploaded recently I assume the design may be the same version(?) of the box that was employed during parts of the IBWO search in the southeast:
http://tinyurl.com/7oqqzde
...would be good to know to what degree Cornell will make the boxes available to interested independent Ivory-bill searchers, or at least give out the specifications for folks who may wish to construct their own?
-----------------------------------------------------------------
The latest issue of Birding Magazine from ABA includes a report from their official Checklist Committee, including the unsurprising decision that the Ivory-billed Woodpecker is not included on the current checklist, remaining instead a Code 6 bird, meaning probably or definitely extinct. The article is available in pdf form here:
http://www.aba.org/birding/v43n6p26.pdf
Meanwhile, Cornell has uploaded a wonderful piece (~11 mins.) with Chris Saker and Martjan Lammertink on the use of a man-made "double-knocker" box to research the Pale-billed Woodpecker in Costa Rica. Although this was only uploaded recently I assume the design may be the same version(?) of the box that was employed during parts of the IBWO search in the southeast:
http://tinyurl.com/7oqqzde
...would be good to know to what degree Cornell will make the boxes available to interested independent Ivory-bill searchers, or at least give out the specifications for folks who may wish to construct their own?
-----------------------------------------------------------------
Thursday, November 17, 2011
-- Some Pileateds In Flight --
----------------------------------------------------------------
FWIW, stills from the Web of Pileateds flying, here:
http://tinyurl.com/7ezs5vp or
http://tinyurl.com/74v6ue4
Obviously, you lose a great deal of information in looking at stills versus a video; on-the-other-hand you gain some clarity and sharpness, that blurry, artifactual video may not offer.
And for new folks, here in slo-mo, is one of the oft-referenced Nolin videos of a PIWO in 'escape flight':
------------------------------------------------------------------
FWIW, stills from the Web of Pileateds flying, here:
http://tinyurl.com/7ezs5vp or
http://tinyurl.com/74v6ue4
Obviously, you lose a great deal of information in looking at stills versus a video; on-the-other-hand you gain some clarity and sharpness, that blurry, artifactual video may not offer.
And for new folks, here in slo-mo, is one of the oft-referenced Nolin videos of a PIWO in 'escape flight':
------------------------------------------------------------------
Tuesday, November 15, 2011
-- Pulliam's Analysis Continued --
------------------------------------------------------------------
For now, just want to make sure everyone is aware that Bill Pulliam has gone ahead and posted more analysis, directed mostly at Louis Bevier's prior work and conclusions (perhaps one of Bill's best posts yet):
http://bbill.blogspot.com/2011/11/woodpecker-wingbeats-revisited.html
And I'd request that if you have comments/questions specific to Bill's analysis you post them on his blog (he shouldn't have to come over here to respond to matters specific to his own work).
ADDENDUM: for quick reference, because of interest in Bill's take on these matters (and new readers to the blog) I've now added direct links in the left-hand column to some of Bill's various IBWO-related posts, right after the list of 'IBWO Links' and before the direct links to skeptics' views.
------------------------------------------------------------------
For now, just want to make sure everyone is aware that Bill Pulliam has gone ahead and posted more analysis, directed mostly at Louis Bevier's prior work and conclusions (perhaps one of Bill's best posts yet):
http://bbill.blogspot.com/2011/11/woodpecker-wingbeats-revisited.html
And I'd request that if you have comments/questions specific to Bill's analysis you post them on his blog (he shouldn't have to come over here to respond to matters specific to his own work).
ADDENDUM: for quick reference, because of interest in Bill's take on these matters (and new readers to the blog) I've now added direct links in the left-hand column to some of Bill's various IBWO-related posts, right after the list of 'IBWO Links' and before the direct links to skeptics' views.
------------------------------------------------------------------
Friday, November 11, 2011
-- More Stuff --
-----------------------------------------------------------------
'Hat tip' to Mark Michaels for directing me to these 2 web pages:
http://eco.confex.com/eco/2011/webprogram/Paper30214.html
http://www.wildernesscenter.org/podcasts/default.aspx?a=152&c=0&k=
The first is simply an abstract on the results of the official IBWO search in South Carolina from Matthew Moskwik -- nothing new here, and I don't know that the full report is accessible anywhere on the Web(?) but still worth a glance.
The second is a recent podcast interview with Tim Gallagher from the Wilderness Center site, primarily on the recent Imperial story (starts at about the 24-min. point). Gallagher doesn't give a lot of interviews, and this is probably the best one I've yet heard from him (~35 mins.).
I'm playing with a possible blurb loosely about "null hypotheses" which may or not ever get posted, but for the few who might be interested I'll throw out a couple of other statistically-oriented posts (will bore most, and only of tenuous value here):
http://scienceblogs.com/principles/2011/09/statistical_significance_is_an.php
http://blogs.discovermagazine.com/gnxp/2011/11/the-problem-of-false-positives/
The first is an old post from physicist Chad Orzel on "statistical significance" and the second a more recent and more technical post from Razib Khan on research false positives. (I only throw these out because they border on why I'm leery of all statistical discussion in regards to a topic like the IBWO -- discussion of null hypotheses can be tricky at best and disingenuous or misleading at worst -- my first stat professor in grad school blanketly told us to distrust ALL discussion of statistics in journal articles that wasn't carried out by Ph.D.-level statisticians, because most others misapply (or misinterpret) stats! -- though maybe things have improved in the last 35 years since then).
And of course feel free to continue any further discussion of matters in the prior post as well.
ADDENDUM: Tim Gallagher's Imperial story also made NPR today (part of all this sudden attention is no doubt due to Gallagher working on a book on the species… I don't mean that cynically, just that if you have a fascinating story at your fingertips you naturally want to publicize it as much as possible). The segment from "Science Friday" is here (just click on the video to hear the audio):
http://www.sciencefriday.com/videos/watch/10414
---------------------------------------------------------------
'Hat tip' to Mark Michaels for directing me to these 2 web pages:
http://eco.confex.com/eco/2011/webprogram/Paper30214.html
http://www.wildernesscenter.org/podcasts/default.aspx?a=152&c=0&k=
The first is simply an abstract on the results of the official IBWO search in South Carolina from Matthew Moskwik -- nothing new here, and I don't know that the full report is accessible anywhere on the Web(?) but still worth a glance.
The second is a recent podcast interview with Tim Gallagher from the Wilderness Center site, primarily on the recent Imperial story (starts at about the 24-min. point). Gallagher doesn't give a lot of interviews, and this is probably the best one I've yet heard from him (~35 mins.).
I'm playing with a possible blurb loosely about "null hypotheses" which may or not ever get posted, but for the few who might be interested I'll throw out a couple of other statistically-oriented posts (will bore most, and only of tenuous value here):
http://scienceblogs.com/principles/2011/09/statistical_significance_is_an.php
http://blogs.discovermagazine.com/gnxp/2011/11/the-problem-of-false-positives/
The first is an old post from physicist Chad Orzel on "statistical significance" and the second a more recent and more technical post from Razib Khan on research false positives. (I only throw these out because they border on why I'm leery of all statistical discussion in regards to a topic like the IBWO -- discussion of null hypotheses can be tricky at best and disingenuous or misleading at worst -- my first stat professor in grad school blanketly told us to distrust ALL discussion of statistics in journal articles that wasn't carried out by Ph.D.-level statisticians, because most others misapply (or misinterpret) stats! -- though maybe things have improved in the last 35 years since then).
And of course feel free to continue any further discussion of matters in the prior post as well.
ADDENDUM: Tim Gallagher's Imperial story also made NPR today (part of all this sudden attention is no doubt due to Gallagher working on a book on the species… I don't mean that cynically, just that if you have a fascinating story at your fingertips you naturally want to publicize it as much as possible). The segment from "Science Friday" is here (just click on the video to hear the audio):
http://www.sciencefriday.com/videos/watch/10414
---------------------------------------------------------------
Tuesday, November 08, 2011
-- Further Imperial Analysis --
------------------------------------------------------------------
Given the time it was taking Bill Pulliam to comment on Cornell's recently-released Imperial Woodpecker footage I presumed he was doing his own in-depth analysis of the clips. And indeed he was. I think we all appreciate Bill's consistent attempts to objectively analyze such pieces of data (…and all the moreso given that, amazingly, he does so on a dial-up internet connection!). His analysis here:
http://bbill.blogspot.com/2011/11/imperial-film.html
To cut to the chase (but I definitely recommend you read Bill's entire post), he concludes that the new Imperial film unhesitatingly RE-AFFIRMS the bird in the original Luneau video as an Ivory-billed Woodpecker. I won't go into the reasoning he marshals toward that conclusion (focusing in part on wing-beat data and 'bowing' motion), nor nitpick over details of his analysis, nor am I personally convinced that this particular film evidence carries as much weight as he (or others) may place on it, but his take is always interesting. Of course, for most readers here, Bill is speaking to the choir anyway.
Until Louis Bevier, or Martin Collinson, or Richard Prum, or Sibley, or some other major skeptic come forth with their own analysis of the amazing film from Mexico the IBWO debate likely won't move any steps forward, and I'm not sure skeptics will even find it worth their time to closely study this new footage of a lone bird -- I don't blame them if they pass -- from their standpoint it's probably a further squandering of their time.
I'll say again what I've said previously… even without the Luneau video (and regardless of what the bird is in that clip) there is more than enough evidence to believe that Ivory-bills persisted into the 21st century, and may still be with us today. Convincing the masses of that though at this point will require more than an analysis of flight patterns or any other tangential evidence; it will require conclusive, indisputable film, or a fresh carcass... the Imperial film can generate a lot of words, most of them falling on the deaf ears of people who have moved on (and it can't explain why no such equivalent film of an IBWO has been attainable in the last 6 years, nor a single active nest-hole found of a bird that has to be actively breeding to still be with us).
On a completely separate note, for anyone who might be interested, once again an original copy of James Tanner's IBWO manuscript is being auctioned on eBay (auction over December 1st), with an asking price of $500+. Merry Christmas!!:
http://tinyurl.com/7czjqa4
------------------------------------------------------------------
Given the time it was taking Bill Pulliam to comment on Cornell's recently-released Imperial Woodpecker footage I presumed he was doing his own in-depth analysis of the clips. And indeed he was. I think we all appreciate Bill's consistent attempts to objectively analyze such pieces of data (…and all the moreso given that, amazingly, he does so on a dial-up internet connection!). His analysis here:
http://bbill.blogspot.com/2011/11/imperial-film.html
To cut to the chase (but I definitely recommend you read Bill's entire post), he concludes that the new Imperial film unhesitatingly RE-AFFIRMS the bird in the original Luneau video as an Ivory-billed Woodpecker. I won't go into the reasoning he marshals toward that conclusion (focusing in part on wing-beat data and 'bowing' motion), nor nitpick over details of his analysis, nor am I personally convinced that this particular film evidence carries as much weight as he (or others) may place on it, but his take is always interesting. Of course, for most readers here, Bill is speaking to the choir anyway.
Until Louis Bevier, or Martin Collinson, or Richard Prum, or Sibley, or some other major skeptic come forth with their own analysis of the amazing film from Mexico the IBWO debate likely won't move any steps forward, and I'm not sure skeptics will even find it worth their time to closely study this new footage of a lone bird -- I don't blame them if they pass -- from their standpoint it's probably a further squandering of their time.
I'll say again what I've said previously… even without the Luneau video (and regardless of what the bird is in that clip) there is more than enough evidence to believe that Ivory-bills persisted into the 21st century, and may still be with us today. Convincing the masses of that though at this point will require more than an analysis of flight patterns or any other tangential evidence; it will require conclusive, indisputable film, or a fresh carcass... the Imperial film can generate a lot of words, most of them falling on the deaf ears of people who have moved on (and it can't explain why no such equivalent film of an IBWO has been attainable in the last 6 years, nor a single active nest-hole found of a bird that has to be actively breeding to still be with us).
On a completely separate note, for anyone who might be interested, once again an original copy of James Tanner's IBWO manuscript is being auctioned on eBay (auction over December 1st), with an asking price of $500+. Merry Christmas!!:
http://tinyurl.com/7czjqa4
------------------------------------------------------------------
Sunday, October 30, 2011
-- Flight of the Imperial --
------------------------------------------------------------------------
Closing out October, as most know, Cornell has released enthralling film from the 1950s of the (presumed extinct) Imperial Woodpecker in Mexico taken by an American dentist and amateur ornithologist of the day (the only known film of the species in existence). The full story here, from Cornell's "Living Bird" magazine, along with other links:
http://tinyurl.com/6ambbns
The more academic article from "The Auk" here:
http://www.birds.cornell.edu/Page.aspx?pid=2163
They have also put the film clip footage up on YouTube:
http://www.youtube.com/watch?v=Q0OCd6b1aXU
On the bright side, the historical story is fascinating, and the brief film clips are mesmerizing to a point of eeriness. For anyone who has followed the Imperial and Ivory-bill story in tandem it virtually sends shivers up the spine... and, also shrouds one's countenance with sadness.
The report is simultaneously a distraction from, and an incentive for, the more immediately-pressing Ivory-bill story. Perhaps it will inspire some of the remaining IBWO searchers, who's zeal might be lagging, to re-double their efforts, or even inspire others to begin anew.
Having said that though, it is again disconcerting that a single amateur on the back of a mule 55 years ago was able to attain film, at quite some distance and obviously with a 1950's camera, of an Imperial Woodpecker that clearly shows the white 'saddle' back, while 6 years of more recent effort with far better equipment, by far more individuals, with more leads, searching far more locales, for the Ivory-bill, has failed to produce such, either by a person or an automatic camera.
Beyond the sheer historical wonder of the report, Cornell argues that measurements of the Imperial's wing-flaps from the restored film lend credence to their original conclusions on the Luneau tape of a purported Ivory-bill:
Still, the single most important sentence in their 'discussion' section is the first one, which will too often be overlooked:
"The information contained in this 85-s film is scant and must be interpreted with caution."
Indeed it is. We are faced again with a whopping sample size of ONE (without a lot of contextual information), and attempts to draw broad generalizations from it. This would never be done in a study of human behavior, but is (egregiously) done too often with abandon in animal and field studies. Any conclusions reached pertain to a single bird in a specific context during a 2-minute point of time in its life... perhaps they apply more broadly... but it is difficult to know.
And I'm all for drawing any conclusions that can be reached ABOUT THIS INDIVIDUAL BIRD, but less confident of how directly such conclusions may apply to Ivory-bills. (Indeed, it's the same complaint I've long voiced for Tanner's observations of a half-dozen birds in a single locale being turned into conclusions that were then applied to all Ivory-bills everywhere.) The main point Cornell seems to wish to make is that it is POSSIBLE for a bird as large as the Imperial (and by implication the IBWO) to maintain a certain high flap-rate never achieved by Pileateds on available film (...ASSUMING you accept Cornell's analysis, and assuming the full range for Pileateds have already been captured and reviewed on tape accurately). And so it goes....
This film, held for an almost unseemly long time by Cornell (since 2006, through the end of the official IBWO search), has been restored, digitized, analyzed by their own people... who now, not too surprisingly, publish conclusions helpful to their cause (would they have even published the results if it were otherwise?) -- and I say that only because cynical sorts will wonder what exactly the lab folks were doing with that film for 5 years before acquiring results to their liking. The entire IBWO debate is polluted enough that skeptics may not take Cornell's conclusions or calculations at face value, unless the raw footage is independently analyzed by impartial third parties (...or else if skeptics themselves analyze it and reach the identical conclusions) -- unfortunately, neither Cornell, nor their critics, nor anyone else with a stake in the debate, are assumed to be objective, unbiased sources of analysis or review anymore, especially given a tendency to cherry-pick data to suit one's purposes. Cornell writes that they have 'allowed for possible inaccuracies in the framespeed of the film'... so, we have their word on that; might have been nice if they had brought in 1 or 2 of their serious critics to collaborate and concur on the analysis. (The internet has spurred a fair amount of such collaboration in math, physics, and even biology these days; in ornithology though, maybe not-so-much.)
Apart from the IBWO debate though, I'm certainly grateful for Cornell's eventual public release of this incredible ornithological relic and the story that goes along with it. For all birders it is a treasure!!
Maybe they'll even release a final summary of the IBWO search as promised before year's end, and in time for this winter's searchers to make use of it....
-------------------------------------------------------------------------
Closing out October, as most know, Cornell has released enthralling film from the 1950s of the (presumed extinct) Imperial Woodpecker in Mexico taken by an American dentist and amateur ornithologist of the day (the only known film of the species in existence). The full story here, from Cornell's "Living Bird" magazine, along with other links:
http://tinyurl.com/6ambbns
The more academic article from "The Auk" here:
http://www.birds.cornell.edu/Page.aspx?pid=2163
They have also put the film clip footage up on YouTube:
http://www.youtube.com/watch?v=Q0OCd6b1aXU
On the bright side, the historical story is fascinating, and the brief film clips are mesmerizing to a point of eeriness. For anyone who has followed the Imperial and Ivory-bill story in tandem it virtually sends shivers up the spine... and, also shrouds one's countenance with sadness.
The report is simultaneously a distraction from, and an incentive for, the more immediately-pressing Ivory-bill story. Perhaps it will inspire some of the remaining IBWO searchers, who's zeal might be lagging, to re-double their efforts, or even inspire others to begin anew.
Having said that though, it is again disconcerting that a single amateur on the back of a mule 55 years ago was able to attain film, at quite some distance and obviously with a 1950's camera, of an Imperial Woodpecker that clearly shows the white 'saddle' back, while 6 years of more recent effort with far better equipment, by far more individuals, with more leads, searching far more locales, for the Ivory-bill, has failed to produce such, either by a person or an automatic camera.
Beyond the sheer historical wonder of the report, Cornell argues that measurements of the Imperial's wing-flaps from the restored film lend credence to their original conclusions on the Luneau tape of a purported Ivory-bill:
"The bird maintains a fast wing-flap rate well into a flight. Data in this film contradict two arguments made about launch and flight behavior of large woodpeckers by Sibley et al. (2006), namely that in normal takeoff a woodpecker holds its tail against the trunk until after its wings are extended and ready for the initial down stroke and, secondly, that woodpeckers larger than the Pileated Woodpecker (Dryocopus pileatus) should flap more slowly than that species.
In fact, whereas Pileated Woodpeckers have been documented to slow to flap rates of 3.9 to 6.7 s–1 through wing-flap 8 postlaunch (Collinson 2007), the film shows that the Imperial Woodpecker could maintain a flap rate of about 7.7 to 8.3 s–1 at that phase of flight, despite having a body mass 2.4× larger than that of a Pileated Woodpecker."
Still, the single most important sentence in their 'discussion' section is the first one, which will too often be overlooked:
"The information contained in this 85-s film is scant and must be interpreted with caution."
Indeed it is. We are faced again with a whopping sample size of ONE (without a lot of contextual information), and attempts to draw broad generalizations from it. This would never be done in a study of human behavior, but is (egregiously) done too often with abandon in animal and field studies. Any conclusions reached pertain to a single bird in a specific context during a 2-minute point of time in its life... perhaps they apply more broadly... but it is difficult to know.
And I'm all for drawing any conclusions that can be reached ABOUT THIS INDIVIDUAL BIRD, but less confident of how directly such conclusions may apply to Ivory-bills. (Indeed, it's the same complaint I've long voiced for Tanner's observations of a half-dozen birds in a single locale being turned into conclusions that were then applied to all Ivory-bills everywhere.) The main point Cornell seems to wish to make is that it is POSSIBLE for a bird as large as the Imperial (and by implication the IBWO) to maintain a certain high flap-rate never achieved by Pileateds on available film (...ASSUMING you accept Cornell's analysis, and assuming the full range for Pileateds have already been captured and reviewed on tape accurately). And so it goes....
This film, held for an almost unseemly long time by Cornell (since 2006, through the end of the official IBWO search), has been restored, digitized, analyzed by their own people... who now, not too surprisingly, publish conclusions helpful to their cause (would they have even published the results if it were otherwise?) -- and I say that only because cynical sorts will wonder what exactly the lab folks were doing with that film for 5 years before acquiring results to their liking. The entire IBWO debate is polluted enough that skeptics may not take Cornell's conclusions or calculations at face value, unless the raw footage is independently analyzed by impartial third parties (...or else if skeptics themselves analyze it and reach the identical conclusions) -- unfortunately, neither Cornell, nor their critics, nor anyone else with a stake in the debate, are assumed to be objective, unbiased sources of analysis or review anymore, especially given a tendency to cherry-pick data to suit one's purposes. Cornell writes that they have 'allowed for possible inaccuracies in the framespeed of the film'... so, we have their word on that; might have been nice if they had brought in 1 or 2 of their serious critics to collaborate and concur on the analysis. (The internet has spurred a fair amount of such collaboration in math, physics, and even biology these days; in ornithology though, maybe not-so-much.)
Apart from the IBWO debate though, I'm certainly grateful for Cornell's eventual public release of this incredible ornithological relic and the story that goes along with it. For all birders it is a treasure!!
Maybe they'll even release a final summary of the IBWO search as promised before year's end, and in time for this winter's searchers to make use of it....
-------------------------------------------------------------------------
Sunday, October 16, 2011
-- Miscellany --
-------------------------------------------------------------------------
Mark Michaels, over at IBWO Researchers' Forum pointed out the below article which briefly mentions that Cuba’s leading ornithologist, Orlando Garrido believes the "Cuban Ivory-billed Woodpecker still lives in remote regions of eastern Cuba":
http://capegazette.villagesoup.com/capelife/story/an-evening-at-the-hook-features-birding-in-cuba-oct-13/165850
[sorry, article appears to no longer be available except via membership]
Meanwhile, in the fun-and-games-with-statistics dept. no less than "The Economist" magazine makes mention of the two recent statistical studies that essentially declare the Ivory-bill extinct (although statistics can't easily or sufficiently be applied to this situation).
http://www.economist.com/node/21532341
And, a nice result for one University of Kentucky professor, whose passion for the Ivory-bill story won him a teaching award from the National Association of Biology Teachers:
http://uknow.uky.edu/content/uk-biology-professor-wins-teaching-award
Lastly, for a trip down memory lane, this press release from 6+ years ago when the whole controversy was blossoming:
http://tinyurl.com/3d4f6th
The leaves will be off the trees soon, and prime IBWO search conditions prevail again, but no idea how many searchers will spend any significant amount of time in the field this season....
--------------------------------------------------------------------
Mark Michaels, over at IBWO Researchers' Forum pointed out the below article which briefly mentions that Cuba’s leading ornithologist, Orlando Garrido believes the "Cuban Ivory-billed Woodpecker still lives in remote regions of eastern Cuba":
http://capegazette.villagesoup.com/capelife/story/an-evening-at-the-hook-features-birding-in-cuba-oct-13/165850
[sorry, article appears to no longer be available except via membership]
Meanwhile, in the fun-and-games-with-statistics dept. no less than "The Economist" magazine makes mention of the two recent statistical studies that essentially declare the Ivory-bill extinct (although statistics can't easily or sufficiently be applied to this situation).
http://www.economist.com/node/21532341
And, a nice result for one University of Kentucky professor, whose passion for the Ivory-bill story won him a teaching award from the National Association of Biology Teachers:
http://uknow.uky.edu/content/uk-biology-professor-wins-teaching-award
Lastly, for a trip down memory lane, this press release from 6+ years ago when the whole controversy was blossoming:
http://tinyurl.com/3d4f6th
The leaves will be off the trees soon, and prime IBWO search conditions prevail again, but no idea how many searchers will spend any significant amount of time in the field this season....
--------------------------------------------------------------------
Saturday, October 01, 2011
-- On Proving a Negative --
-------------------------------------------------------------------------
In a comment on the previous post, "Steve" essentially asks WHAT will it take for some of us to conclude that the Ivory-bill is no more? I was going to respond in the comments (and now Jacob has) but it deserves a separate (more long-winded) post, since it's such a common question:
The basic answer is pretty simple... you send capable folks out to areas that a species might conceivably remain in (or actually have been sighted) and do a reasonably thorough, organized search... AND come up empty-handed... NO credible sightings, nor signs of the bird's presence. THAT would be indicative of possible extinction. You can't prove extinction; you can only keep amassing more and more data toward its support.
If such searches were conducted for the Dodo, or Moa, or even Passenger Pigeon, most likely there would be nothing to show for it. But in the case of the Ivory-bill almost every such large scale search results in (even if skeptics don't acknowledge it) a few sightings claims from credentialed, credible individuals, and additional possible signs of the bird (foraging signs, cavities, auditory encounters) -- if there were sightings with NO such other evidence, it would be more difficult to take the sightings seriously... OR, if there were signs, but without ever any sightings, the signs could be easily written off; but the fact that both types of evidence occur on rare, yet repeated occasions, makes it more difficult to simply ad hoc (because it fits a preconceived hypothesis), label them all 'mistakes' and misidentifications. Indeed, as I've argued previously, if mistakes are this easy and prevalent in birding then doing bird counts and censuses must be a futile waste of time, they would be so heavily flawed in regards to look-alike birds (and the majority of birds have look-alikes). [Indeed, many argue that the actual raw data of bird counts is hugely erroneous (both unreliable and invalid), and the only real worth derives from looking at relative trend figures over extended periods of time.]
Nor does it matter if there are 5000 other individuals with little credibility or experience who erroneously report IBWOs; you can't automatically generalize from such known instances to all cases, but must view each case individually on its own merits (or lack thereof).
Yes, it is hugely troublesome that these unconfirmed claims have been going on for 60+ years without verification or better photographic evidence. And frustrating too that claims still come from widely disparate areas -- almost certainly there can't be that many separate populations of IBWO left. I understand why the likes of Paul Sykes, Jerry Jackson, and others have largely given up hope that such claims make much sense any longer, no matter how credible or certain any given observer. When every followup seems to fail to definitively confirm the birds once-and-for-all, it is easy to conclude that a telling pattern is evident.
I continually have to ask though, if a bird is truly incredibly rare, possibly even hanging on by a thread, residing in remote, difficult habitat (not well-frequented by birders), living principally high up in tree canopies and within cavities, possibly wary of humans, and capable of rapid long-distance flight... then what would the evidence, if any, for its existence look like -- and maybe, perhaps, just possibly, it might look very similar to that which we have before us. The best explanatory fit and best odds for the entire panoply of evidence at hand may still be that a few Ivory-bills swoop and kent and double-knock somewhere in a dense quarter of the American Southeast.
...Or, not. The limits of my own patience do creep closer with each passing year.
And here's the story of another bird species (the Jerdon’s Courser) that relates somewhat to this whole discussion:
http://www.downtoearth.org.in/content/lives-others?page=0,3 ------------------------------------------------------------------------
In a comment on the previous post, "Steve" essentially asks WHAT will it take for some of us to conclude that the Ivory-bill is no more? I was going to respond in the comments (and now Jacob has) but it deserves a separate (more long-winded) post, since it's such a common question:
The basic answer is pretty simple... you send capable folks out to areas that a species might conceivably remain in (or actually have been sighted) and do a reasonably thorough, organized search... AND come up empty-handed... NO credible sightings, nor signs of the bird's presence. THAT would be indicative of possible extinction. You can't prove extinction; you can only keep amassing more and more data toward its support.
If such searches were conducted for the Dodo, or Moa, or even Passenger Pigeon, most likely there would be nothing to show for it. But in the case of the Ivory-bill almost every such large scale search results in (even if skeptics don't acknowledge it) a few sightings claims from credentialed, credible individuals, and additional possible signs of the bird (foraging signs, cavities, auditory encounters) -- if there were sightings with NO such other evidence, it would be more difficult to take the sightings seriously... OR, if there were signs, but without ever any sightings, the signs could be easily written off; but the fact that both types of evidence occur on rare, yet repeated occasions, makes it more difficult to simply ad hoc (because it fits a preconceived hypothesis), label them all 'mistakes' and misidentifications. Indeed, as I've argued previously, if mistakes are this easy and prevalent in birding then doing bird counts and censuses must be a futile waste of time, they would be so heavily flawed in regards to look-alike birds (and the majority of birds have look-alikes). [Indeed, many argue that the actual raw data of bird counts is hugely erroneous (both unreliable and invalid), and the only real worth derives from looking at relative trend figures over extended periods of time.]
Nor does it matter if there are 5000 other individuals with little credibility or experience who erroneously report IBWOs; you can't automatically generalize from such known instances to all cases, but must view each case individually on its own merits (or lack thereof).
Yes, it is hugely troublesome that these unconfirmed claims have been going on for 60+ years without verification or better photographic evidence. And frustrating too that claims still come from widely disparate areas -- almost certainly there can't be that many separate populations of IBWO left. I understand why the likes of Paul Sykes, Jerry Jackson, and others have largely given up hope that such claims make much sense any longer, no matter how credible or certain any given observer. When every followup seems to fail to definitively confirm the birds once-and-for-all, it is easy to conclude that a telling pattern is evident.
I continually have to ask though, if a bird is truly incredibly rare, possibly even hanging on by a thread, residing in remote, difficult habitat (not well-frequented by birders), living principally high up in tree canopies and within cavities, possibly wary of humans, and capable of rapid long-distance flight... then what would the evidence, if any, for its existence look like -- and maybe, perhaps, just possibly, it might look very similar to that which we have before us. The best explanatory fit and best odds for the entire panoply of evidence at hand may still be that a few Ivory-bills swoop and kent and double-knock somewhere in a dense quarter of the American Southeast.
...Or, not. The limits of my own patience do creep closer with each passing year.
And here's the story of another bird species (the Jerdon’s Courser) that relates somewhat to this whole discussion:
http://www.downtoearth.org.in/content/lives-others?page=0,3 ------------------------------------------------------------------------
Sunday, September 25, 2011
Where oh Where....
--------------------------------------------------------------------------
Nice summary piece of Ivory-bill matters at this point here:
http://www.miller-mccune.com/environment/long-slog-for-the-ivory-billed-woodpecker-36270/
My favorite quote from it comes from Chuck Hunter with USFWS:
“If no further observations are made, it could be another 30 years before the species is declared extinct... But within the U.S. Fish and Wildlife community, we are not ready to declare it extinct. I have not seen compelling evidence to suggest it’s extinct.”
That reflects my own outlook (though I think the "30 years" figure an exaggeration)... I'm not just looking for solid documentation that the species exists; I'm looking alternatively for compelling evidence that it does not, and given the number and type of reports across decades, that evidence (for extinction) also remains largely conjectural and less-than-overwhelming.
On a complete side-note, those who recall Dr. Martin Collinson's past role in the IBWO debate, may be interested to know he has authored an article in the current edition of "Birding" concerning the identification of the (likely extinct) Eskimo Curlew:
http://blog.aba.org/2011/09/thoughts-on-the-september-2011-birding-part-1-of-3.html
[above pic via Wikimedia Commons of original Singer Tract IBWOs]
--------------------------------------------------------------------------
Nice summary piece of Ivory-bill matters at this point here:
http://www.miller-mccune.com/environment/long-slog-for-the-ivory-billed-woodpecker-36270/
My favorite quote from it comes from Chuck Hunter with USFWS:
“If no further observations are made, it could be another 30 years before the species is declared extinct... But within the U.S. Fish and Wildlife community, we are not ready to declare it extinct. I have not seen compelling evidence to suggest it’s extinct.”
That reflects my own outlook (though I think the "30 years" figure an exaggeration)... I'm not just looking for solid documentation that the species exists; I'm looking alternatively for compelling evidence that it does not, and given the number and type of reports across decades, that evidence (for extinction) also remains largely conjectural and less-than-overwhelming.
On a complete side-note, those who recall Dr. Martin Collinson's past role in the IBWO debate, may be interested to know he has authored an article in the current edition of "Birding" concerning the identification of the (likely extinct) Eskimo Curlew:
http://blog.aba.org/2011/09/thoughts-on-the-september-2011-birding-part-1-of-3.html
[above pic via Wikimedia Commons of original Singer Tract IBWOs]
--------------------------------------------------------------------------
Friday, September 02, 2011
-- "God, What Were They Thinking Of?" ...Indeed --
-------------------------------------------------------------------------
Apparently yesterday Sept. 1 was the 97th anniversary of the death (in captivity) of "Martha" the last known Passenger Pigeon; probably something worth noting on this blog.
http://www.mnn.com/earth-matters/animals/blogs/ode-to-martha-the-last-passenger-pigeon
-----------------------------------------------------------------------
Apparently yesterday Sept. 1 was the 97th anniversary of the death (in captivity) of "Martha" the last known Passenger Pigeon; probably something worth noting on this blog.
http://www.mnn.com/earth-matters/animals/blogs/ode-to-martha-the-last-passenger-pigeon
-----------------------------------------------------------------------
Tuesday, August 30, 2011
-- August Sign-off --
-------------------------------------------------------------------------
May as well note a couple things before August passes...
1. Audio interview with Dan Mennill of the Auburn (Choctawhatchee) search team from a few weeks back here:
http://www.cbc.ca/thebridge/episodes/2011/08/17/ghost-bird-the-illusive-ivory-billed-woodpecker/
2. The current edition of Bird Watcher's Digest includes an article starting out thusly:
"Paddling along in an Arkansas swamp, you raise your binoculars to catch a glimpse of a huge black and white woodpecker. Your camera, of course, is in its waterproof bag by your side, and by the time you get it out, aim, and focus, the bird is gone. If only your binoculars had a button that could capture what you see.
Birders would love such a hybrid device: small, portable, roof-prism binoculars with a built-in digital camera."
Such binoculars have actually been around for sometime now, but the quality was lacking. This particular article more-or-less favorably reviews the new Bushnell SyncFocus 8x30mm binocs (at $200-$300, the quality of the digital photography still might only be good enough for a clear view of a perched IBWO and inadequate for a flying specimen).
On-the-other-hand, if you have $1400 or $2000 to expend in this economy you may wish to wait for the recently-touted Sony DEV-3 or Sony DEV-5 video-recording binoculars (due out in November):
http://tinyurl.com/42s4koy
3. Finally, on a sidenote, for any of you who own Noel Snyder's 150-pg. 2004 volume, "The Carolina Parakeet," don't give it up cheaply... I just ran across a copy in a used bookstore priced at $50. I've reported here before that some 20 years ago I ran across what I thought was an over-priced copy of James Tanner's original "The Ivory-billed Woodpecker" similarly priced around $50, and today they run for about $500. So who knows....
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May as well note a couple things before August passes...
1. Audio interview with Dan Mennill of the Auburn (Choctawhatchee) search team from a few weeks back here:
http://www.cbc.ca/thebridge/episodes/2011/08/17/ghost-bird-the-illusive-ivory-billed-woodpecker/
2. The current edition of Bird Watcher's Digest includes an article starting out thusly:
"Paddling along in an Arkansas swamp, you raise your binoculars to catch a glimpse of a huge black and white woodpecker. Your camera, of course, is in its waterproof bag by your side, and by the time you get it out, aim, and focus, the bird is gone. If only your binoculars had a button that could capture what you see.
Birders would love such a hybrid device: small, portable, roof-prism binoculars with a built-in digital camera."
Such binoculars have actually been around for sometime now, but the quality was lacking. This particular article more-or-less favorably reviews the new Bushnell SyncFocus 8x30mm binocs (at $200-$300, the quality of the digital photography still might only be good enough for a clear view of a perched IBWO and inadequate for a flying specimen).
On-the-other-hand, if you have $1400 or $2000 to expend in this economy you may wish to wait for the recently-touted Sony DEV-3 or Sony DEV-5 video-recording binoculars (due out in November):
http://tinyurl.com/42s4koy
3. Finally, on a sidenote, for any of you who own Noel Snyder's 150-pg. 2004 volume, "The Carolina Parakeet," don't give it up cheaply... I just ran across a copy in a used bookstore priced at $50. I've reported here before that some 20 years ago I ran across what I thought was an over-priced copy of James Tanner's original "The Ivory-billed Woodpecker" similarly priced around $50, and today they run for about $500. So who knows....
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Monday, August 08, 2011
-- Nest Predation --
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Some time back I mentioned that a bird rehabilitator friend had lost a juvenile Pileated Woodpecker to a black snake that gained access to a pen. And I wondered aloud to what degree snakes may have have been a significant culprit of the historically low reproduction rates reported for Ivory-bills. Interestingly (to me), Brandon Noel concludes in his recent PhD. dissertation that black snakes are indeed the single greatest predator of Pileated Woodpecker nestlings (in the Southeast anyway), and presumes the likelihood that they preyed upon Ivory-bill nests as well, possibly as a significant limiting factor on IBWO populations.
From another site, a story and some photos here of a Pileated protecting its young from an intruding black snake:
http://birdsandbloomsblog.com/2011/07/13/woodpecker-saves-young/
And, not a Pileated (instead, a tropical Crimson-crested Woodpecker), but if you missed this video of a Woodpecker protecting its nest from a couple years back, well, it's a MUST-see:
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Some time back I mentioned that a bird rehabilitator friend had lost a juvenile Pileated Woodpecker to a black snake that gained access to a pen. And I wondered aloud to what degree snakes may have have been a significant culprit of the historically low reproduction rates reported for Ivory-bills. Interestingly (to me), Brandon Noel concludes in his recent PhD. dissertation that black snakes are indeed the single greatest predator of Pileated Woodpecker nestlings (in the Southeast anyway), and presumes the likelihood that they preyed upon Ivory-bill nests as well, possibly as a significant limiting factor on IBWO populations.
From another site, a story and some photos here of a Pileated protecting its young from an intruding black snake:
http://birdsandbloomsblog.com/2011/07/13/woodpecker-saves-young/
And, not a Pileated (instead, a tropical Crimson-crested Woodpecker), but if you missed this video of a Woodpecker protecting its nest from a couple years back, well, it's a MUST-see:
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Thursday, July 28, 2011
-- Here and There --
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Passed around lately, a 6-minute comedy routine surprisingly centered around the Ivory-billed Woodpecker here:
http://vimeo.com/moogaloop.swf?clip_id=11909400
(caution: funny stuff, but some rough language for those with sensibilities to such)
As many know, there have also been some stills and video of purported/possible IBWOs floating around in the last month. A couple of instances pretty clearly show identifiable Pileateds, and I don't know that birds in the third instance are identifiable, but I see no strong case for signifying them Ivory-bills (there's a lot of information I don't have about the particular piece of film... but that only makes me even more suspicious of it). Again, at this point, we're in need of video that requires no analysis, but that shows what any birder can recognize as an Ivory-billed Woodpecker in 10 seconds of viewing... and then the provider of any such video must be prepared for intense and lengthy interrogation!
Finally, an interesting followup to the supposed travels of a mountain lion that ended up as roadkill in Connecticut back in early June:
http://tinyurl.com/3tu92n5
And to end, must note that today is the 15th anniversary of Roger Tory Peterson's death. By his own admission, his greatest birding adventure of all time was searching for the Ivory-billed Woodpecker at the Singer Tract in May, 1942 -- his party, led by J.J. Kuhn, saw 2 females, and he joined that elite group of 1940's birders who's Ivory-bill encounters are unchallenged. He seemed to never completely give up hope for the species; I wish he'd been around for David Kulivan's claims just a few years following his death.
In memory, I've always loved the sign-off of Pete Dunne's wonderful eulogy to Roger:
Passed around lately, a 6-minute comedy routine surprisingly centered around the Ivory-billed Woodpecker here:
http://vimeo.com/moogaloop.swf?clip_id=11909400
(caution: funny stuff, but some rough language for those with sensibilities to such)
As many know, there have also been some stills and video of purported/possible IBWOs floating around in the last month. A couple of instances pretty clearly show identifiable Pileateds, and I don't know that birds in the third instance are identifiable, but I see no strong case for signifying them Ivory-bills (there's a lot of information I don't have about the particular piece of film... but that only makes me even more suspicious of it). Again, at this point, we're in need of video that requires no analysis, but that shows what any birder can recognize as an Ivory-billed Woodpecker in 10 seconds of viewing... and then the provider of any such video must be prepared for intense and lengthy interrogation!
Finally, an interesting followup to the supposed travels of a mountain lion that ended up as roadkill in Connecticut back in early June:
http://tinyurl.com/3tu92n5
And to end, must note that today is the 15th anniversary of Roger Tory Peterson's death. By his own admission, his greatest birding adventure of all time was searching for the Ivory-billed Woodpecker at the Singer Tract in May, 1942 -- his party, led by J.J. Kuhn, saw 2 females, and he joined that elite group of 1940's birders who's Ivory-bill encounters are unchallenged. He seemed to never completely give up hope for the species; I wish he'd been around for David Kulivan's claims just a few years following his death.
In memory, I've always loved the sign-off of Pete Dunne's wonderful eulogy to Roger:
"Roger was fond of saying that God, in all his wisdom, had crafted but two creatures with feathers: birds and angels. God, in his wisdom, gave us Roger Tory Peterson to interpret and instruct us. And although I do not wish to presume, and I cannot possibly be certain, I have a hunch that by the time I reach the hereafter, there will be a Field Guide to the Angels waiting for me. With luck, it might even be in its second or third edition." :-)-------------------------------------------------------------------------
Monday, July 18, 2011
-- The Road Ahead? --
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Yeah, slow as molasses around here, and expecting it to remain so through year's end....
End of July marks the 6th anniversary of this blog, beginning a half-dozen years ago with the idea of being a newsreel of occasional monthly updates on the progress of an Ivory-billed Woodpecker recovery program. ...Little knowing the controversy that would arise within but a couple of weeks over the very validity of Cornell's announced findings... nor the growing nature of that controversy.
On the bright side, six years has convinced me that there is enough habitat, enough food, enough adequately-sized trees, enough remoteness, to support small numbers of Ivory-bills in multiple areas. And a sporadic, even if scarce, continuous record of sightings over 60+ years from certain experienced, credible observers still hints at the species persistence. At least some auditory and foraging evidence lends support to that possibility.
On the downside, rapid and lengthy followup to good sightings (including even "hot zones") has not only failed to produce clear-cut photographic documentation of the species, but hasn't even produced the number of additional good sightings one might expect. And millions of automatic snapshots taken at suggestive cavities, foraging spots, and other specifically-selected sites have failed to capture a single clear picture of Campephilus principalis. If Ivory-bills exist, then human stalking competency of rare birds seems NOT to! Indeed, individual sightings are hardly taken seriously anymore; short of photographic evidence, lengthy, multiple, close-up sightings by experienced, well-vetted observers now seem required.
After 6 frustrating years little has substantively changed, except for the spread of skepticism. Arkansas, Mississippi, Louisiana, Florida,E. W. Tennessee continue to interest me, but that is meaningless until evidence breaks which is compelling to the wider, cynical birding and scientific community. At some point I expect there will again be such a story to cover (though a year from now I could feel differently), just hope it doesn't take 5 years as between David Kulivan's claims and Gene Sparling's!
I won't henceforth attempt the frequency of posts maintained here for the past 6 roller-coaster years (almost 5 per wk.). Obviously, I'll post whenever something arises I deem particularly timely and important, be that once-a-month or once-a-year! Otherwise, I may continue to cover the odd array of material I've covered all along, but perhaps with only 1-2 blog posts per month, each lumping several different non-time-dependent posts/links together into one.
Finally, at some point I may move the blog over to Google's current platform (they've been asking me to do that for about 3 years!), which could disrupt things quite a bit -- posts should remain intact, but the left-hand-column, and other formatting, may be affected a lot, and don't know how long it would take me to reconstruct it (I know just enough HTML to be a danger to myself ;-). Will try to warn readers ahead of time if/when I'm about to do that, in case there are sites you've been routinely linking to from here that you may wish to bookmark.
P.S. -- Multiple internet activities these days hinder me from consistently responding to emailers on Ivory-bill matters as I once did, but I do still appreciate the info or interest that folks send this way, even when I don't find the time to reply.
Maybe just some music pulled from the left column to close out with for the moment:
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Yeah, slow as molasses around here, and expecting it to remain so through year's end....
End of July marks the 6th anniversary of this blog, beginning a half-dozen years ago with the idea of being a newsreel of occasional monthly updates on the progress of an Ivory-billed Woodpecker recovery program. ...Little knowing the controversy that would arise within but a couple of weeks over the very validity of Cornell's announced findings... nor the growing nature of that controversy.
On the bright side, six years has convinced me that there is enough habitat, enough food, enough adequately-sized trees, enough remoteness, to support small numbers of Ivory-bills in multiple areas. And a sporadic, even if scarce, continuous record of sightings over 60+ years from certain experienced, credible observers still hints at the species persistence. At least some auditory and foraging evidence lends support to that possibility.
On the downside, rapid and lengthy followup to good sightings (including even "hot zones") has not only failed to produce clear-cut photographic documentation of the species, but hasn't even produced the number of additional good sightings one might expect. And millions of automatic snapshots taken at suggestive cavities, foraging spots, and other specifically-selected sites have failed to capture a single clear picture of Campephilus principalis. If Ivory-bills exist, then human stalking competency of rare birds seems NOT to! Indeed, individual sightings are hardly taken seriously anymore; short of photographic evidence, lengthy, multiple, close-up sightings by experienced, well-vetted observers now seem required.
After 6 frustrating years little has substantively changed, except for the spread of skepticism. Arkansas, Mississippi, Louisiana, Florida,
I won't henceforth attempt the frequency of posts maintained here for the past 6 roller-coaster years (almost 5 per wk.). Obviously, I'll post whenever something arises I deem particularly timely and important, be that once-a-month or once-a-year! Otherwise, I may continue to cover the odd array of material I've covered all along, but perhaps with only 1-2 blog posts per month, each lumping several different non-time-dependent posts/links together into one.
Finally, at some point I may move the blog over to Google's current platform (they've been asking me to do that for about 3 years!), which could disrupt things quite a bit -- posts should remain intact, but the left-hand-column, and other formatting, may be affected a lot, and don't know how long it would take me to reconstruct it (I know just enough HTML to be a danger to myself ;-). Will try to warn readers ahead of time if/when I'm about to do that, in case there are sites you've been routinely linking to from here that you may wish to bookmark.
P.S. -- Multiple internet activities these days hinder me from consistently responding to emailers on Ivory-bill matters as I once did, but I do still appreciate the info or interest that folks send this way, even when I don't find the time to reply.
Maybe just some music pulled from the left column to close out with for the moment:
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Saturday, July 09, 2011
-- Arkansas Big Woods via YouTube --
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A nice float along Bayou de View here:
...and, a longer look at the Arkansas Big Woods here:
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A nice float along Bayou de View here:
...and, a longer look at the Arkansas Big Woods here:
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Tuesday, June 28, 2011
-- Time For Another Episode of Comic Relief --
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From those fine folks who brought us Monty Python and Benny Hill... :
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From those fine folks who brought us Monty Python and Benny Hill... :
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Thursday, June 23, 2011
-- Eskimo Curlew... --
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Summer is not a pleasant time to be searching for the Ivory-billed Woodpecker, but it's a possible time to look for the Eskimo Curlew, another avian ghost. Reuters reports that USFWS is trying to decide on the species' current classification:
http://tinyurl.com/6djezvs
And in an older post on this blog Bob Russell listed places that he deemed worth looking for the ESCU:
1. Texas—Louisiana Gulf Coast. It seems reasonable to include the area(s) with the most recent verified report(s) and that would be Galveston Island. Hurricane Gustav recently cleaned off a large portion of the housing on the western portion of the island but left a huge debris field on former pastures and marshland where the 1959-1962 bird or birds were seen (3 birds reported together in 1962). Give this area a couple of years to recover some vegetative cover and try the last week of March and the first half of April, perhaps in association with American Golden-plovers or Buff-breasted Sandpipers. Large concentrations of shorebirds occur at other nearby sites such as the islands in Galveston Bay (Atkinson Island where a flock of 23 birds was reported on 7 May 1981). The Bolivar Flats, although well-watched over the years, is another site that should be checked if you are in the area. Base in Galveston once the motels get repaired. In Louisiana the southwestern portion of the state is frequently birded but most observers hit the usual “chain of pearls” refuges near the coast. There are many areas away from the coast that host tens of thousands, even hundreds of thousands of shorebirds during spring migration and many of these sites never see a birder all year. Some of these are rice fields in various stages of planting / preparation; others are abandoned or seasonally fallow fields from Crowley west to the state line. Although most birding is done south of I-10, there is extensive habitat in Acadia and Jefferson Davis Parishes north of the I-10. Base out of Jennings, Abbeville, or Lake Charles.
2. Central Nebraska. Historically, most concentrated in York, Fillmore, and Hamilton Counties between the 87th and 98th parallel. Joel Jorgensen, Nebraska Division of State Parks, has documented large flocks of stopover Buff-breasted Sandpipers in York County in spring but has had no sightings of curlews. There is one recent sighting by Craig Faanes (author of Birds of the St. Croix River Valley) in York County in spring which some people reject. Arrives 18-25 April, departing 15-25 May. Frequented open wheat fields and “tame” meadows in later years, originally often found in burnt meadows and prairies. Base in Grand Island, York, or Aurora.
3. Christian County, Illinois / Benton County, Indiana. The largest staging flocks of American Golden-plover known in the world regularly stage from mid-April to mid-May in northwest Indiana and east central Illinois. These plovers were frequent traveling companions of Eskimo Curlew and were one of the few species able to fly as fast and keep up with the curlews. The best way to find flocks of plovers is to peruse a DeLorme Illinois Atlas and find the headwaters of various small tributaries that historically indicated wet prairie areas. The plovers still prefer these oftentimes wet areas even though most are in soybeans nowadays. Check adjacent low wet areas as well. Christian County stands out in Midwest hunting literature as a place of great curlew hunting opportunities! Of course that was 1880 but maybe they’ve recovered—someone ought to check it out. Base in Taylorville or Springfield for Christian County; in Lafayette or Kentland for Benton County. Large wind turbine fields may now threaten many of these plover sites in Benton County. Rather than direct mortality the plovers may just be abandoning these staging areas, perhaps used since the Pleistocene ice sheets retreated.
4. Southeastern South Dakota vic. Yankton. 3-10 May between Ft. Randall and Yankton. Associated here with Upland Sandpipers and American Golden-plovers. Birds once seen commonly as far east as Vermillion on grasslands above Missouri River. There are numerous small sloughs in the area and a fair amount of pastureland. Apparently this was the northernmost major staging area before northern Saskatchewan as the bird was seldom reported from northeastern South Dakota or North Dakota. Base in Yankton.
5. Newfoundland—Labrador. Although the last record was of a pair in 1932, almost every year one or two Canadian birders still visit the former haunts of this species where the species first staged south of its Arctic breeding range, feeding mainly on crowberries. Sites to try include Battle Harbor, Hamilton Inlet entrance (where they normally arrived on 23rd August), Henley Harbor, Indian Tickle, Isle of Ponds, Curlew Harbor, Table Bay, and Gready Island. This is wonderful, wild, remote country. Access by a ferryboat that visits most of these sites with reservations needed a year or more in advance. Getting to these sites once explored by Audubon is a challenge.
6. Iles de la Madeleine, Quebec. Remote, scenic and sophisticated, this chain of islands connected by sandbars and one road annually hosts thousands of shorebirds in fall including Whimbrel and American Golden-plover. Historically, Eskimo Curlews were regular here between 20 August and 6 September although there are no recent records. Area included because it was on a direct passage route for this curlew and still contains large bog areas replete with abundant berry bushes and hundreds of acres of short-cropped fields and some of the largest sandflats and tidal flats in the hemisphere. Very low level of birding activity and relatively easy to reach (by plane from Montreal or ferry from Prince Edward Island). Excellent motels on French portion of this bilingual island chain in Cap-aux-Meules.
7. Miscou Island, New Brunswick. Immense numbers of this species once frequented the coast from Shediac to Dalhousie with the largest flocks often on this small island at the tip of the province. Still largely unspoiled, the island is covered by dozens of small ponds surrounded by dense stands of many species of subarctic berry bushes upon which the birds reportedly fed. The island has hundreds of shorebirds both as foragers and flybys during August and September. During the heyday of Eskimo Curlews, they reportedly arrived often before the 15th of August and remained until about the 15th of September, departing before the Whimbrel departed. Many observers commented that the years of highest curlew abundance also had prevailing strong easterly gales during the fall. A very small motel is present at the base of the island bridge and other motels are nearby along the Acadian coast.
8. Martha’s Vineyard / Nantucket Island / Monomoy Island, Massachusetts. During periods of east winds these offshore islands of Massachusetts often held hundreds of curlews seeking shelter from the storms. Reported from Martha’s Vineyard on 6-7 August 1972 and 30 August 2002 (Gay Head), a report not accepted by the bird committee but which one committee member described as totally convincing. With 2 (yes 2!) recent reports this island may be the place to head to during east winds in autumn if you can afford the overpriced motels.
9. Portsmouth Island—Cape Lookout National Seashore. This is a gem of a shorebird stopover site, a 40-mile+ long island of sand, sandflats, meadows, and islets as remote as any site on the USA east coast and virtually undisturbed. Stay on neighboring Ocracoke Island, itself well worth checking the south end for shorebirds, and hire the local boat shuttle ($25.00) for the short 15-minute ride over to Portsmouth (includes free lecture on natural history and ineptitude of National Park Service) or get an SUV and take a car ferry over to the Core Banks from the mainland (see Cape Lookout National Seashore website) and drive northward. Almost every shorebird species known in eastern USA has been recorded here. Bring lots of bug spray and sunburn oil and be prepared to walk (or drive—4-wheel drive only) miles. Uninhabited except for a few hunting camps and cabins in the now ghost town of Portsmouth. A recent spring report was made by an expert birder in 1972 at Pea Island north of here, one seen with 3 Whimbrels.
10. Prince Edward Island, Canada. This quiet, lightly-birded island of potato fields, spruce forests, and remote beaches would seem like a likely candidate for hiding migrant curlews. I would concentrate on fields on the east side of the island, the shorebird flats at Prince Edward National Park along the north shore at North Rustico, the Malpeque area where once reported to be very common, and the remote northwest corner of the island where I haven’t yet ventured but looks good on Google Earth. 25 August to 28 September. Base in Charlottetown.
Honorable mentions:
11. Cape Henrietta Maria. Ontario. Very remote but tens of thousands of shorebirds pass this site in southbound migration. Access by air and bring a gun for polar bear protection.
12. Mar Chiquita, Argentina Mar Chiquita is located northeast of the province of Cordoba and is the largest inland saline body of water in Argentina covering roughly 6000 square kilometers with a floodable plain embracing another 4,000 square kilometers. As many as 4 Eskimo Curlews have been reported from here in a single flock in recent decades. The size of the area and the number of birds is overwhelming but this may be the single best spot for searching for wintering birds. Base in the city of Santa Fe or camp along the shores.
13. Mingan Islands, Quebec. Off the north shore of the Gulf of St. Lawrence, these remote islands are reachable by rented boat or kayak. Many shorebirds stage here in late summer but the islands have been rarely ever birded. This is a major staging area for Red Knots in fall. Check out their website at: http://www.canadianparks.com/quebec/minganp/index.htm
14. Sable Island, Nova Scotia. One requires a scientific permit / reason to visit this national treasure far off the Nova Scotian coast. The breeding home of the Ipswich (Savanna Sparrow) and the most remote place in the Maritimes, one could always fake a shipwreck and bird while waiting for possible rescue. If you don’t get rescued, at least be good enough to leave us a detailed description of the curlew you see as your last lifer before expiring so we can publish it and run it by the records committee. Sable Island is a sand bar - 42 km long and roughly 1.5 km wide - located far offshore, approximately 160 km southeast of Canso, Nova Scotia, the nearest landfall. The island has been the focus of human activities, imagination and speculation for roughly 500 years. Shipwrecks, wild horses, seabirds and seals, and inaccessibility have endowed this narrow wind-swept sliver of sand with a special mystique.
15. Barbados (Graeme Hall Swamp and vicinity). The last specimen of Eskimo Curlew was collected by a hunter on 4 September 1963 near this site. The site was a private hunting club and may be still but I have no recent information on its status or current habitat. Nearby Graeme Hall Swamp ($13.00 entrance fee) has hundreds of acres of protected habitat with numerous shorebirds at low tide. Barbados was a bottleneck for the species, a first resting spot for tired birds departing from Maritime Canada and flying over the Atlantic Ocean.
[p.s. there's actually a small Facebook group dedicated to the search for the ESCU, as well.]
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Summer is not a pleasant time to be searching for the Ivory-billed Woodpecker, but it's a possible time to look for the Eskimo Curlew, another avian ghost. Reuters reports that USFWS is trying to decide on the species' current classification:
http://tinyurl.com/6djezvs
And in an older post on this blog Bob Russell listed places that he deemed worth looking for the ESCU:
1. Texas—Louisiana Gulf Coast. It seems reasonable to include the area(s) with the most recent verified report(s) and that would be Galveston Island. Hurricane Gustav recently cleaned off a large portion of the housing on the western portion of the island but left a huge debris field on former pastures and marshland where the 1959-1962 bird or birds were seen (3 birds reported together in 1962). Give this area a couple of years to recover some vegetative cover and try the last week of March and the first half of April, perhaps in association with American Golden-plovers or Buff-breasted Sandpipers. Large concentrations of shorebirds occur at other nearby sites such as the islands in Galveston Bay (Atkinson Island where a flock of 23 birds was reported on 7 May 1981). The Bolivar Flats, although well-watched over the years, is another site that should be checked if you are in the area. Base in Galveston once the motels get repaired. In Louisiana the southwestern portion of the state is frequently birded but most observers hit the usual “chain of pearls” refuges near the coast. There are many areas away from the coast that host tens of thousands, even hundreds of thousands of shorebirds during spring migration and many of these sites never see a birder all year. Some of these are rice fields in various stages of planting / preparation; others are abandoned or seasonally fallow fields from Crowley west to the state line. Although most birding is done south of I-10, there is extensive habitat in Acadia and Jefferson Davis Parishes north of the I-10. Base out of Jennings, Abbeville, or Lake Charles.
2. Central Nebraska. Historically, most concentrated in York, Fillmore, and Hamilton Counties between the 87th and 98th parallel. Joel Jorgensen, Nebraska Division of State Parks, has documented large flocks of stopover Buff-breasted Sandpipers in York County in spring but has had no sightings of curlews. There is one recent sighting by Craig Faanes (author of Birds of the St. Croix River Valley) in York County in spring which some people reject. Arrives 18-25 April, departing 15-25 May. Frequented open wheat fields and “tame” meadows in later years, originally often found in burnt meadows and prairies. Base in Grand Island, York, or Aurora.
3. Christian County, Illinois / Benton County, Indiana. The largest staging flocks of American Golden-plover known in the world regularly stage from mid-April to mid-May in northwest Indiana and east central Illinois. These plovers were frequent traveling companions of Eskimo Curlew and were one of the few species able to fly as fast and keep up with the curlews. The best way to find flocks of plovers is to peruse a DeLorme Illinois Atlas and find the headwaters of various small tributaries that historically indicated wet prairie areas. The plovers still prefer these oftentimes wet areas even though most are in soybeans nowadays. Check adjacent low wet areas as well. Christian County stands out in Midwest hunting literature as a place of great curlew hunting opportunities! Of course that was 1880 but maybe they’ve recovered—someone ought to check it out. Base in Taylorville or Springfield for Christian County; in Lafayette or Kentland for Benton County. Large wind turbine fields may now threaten many of these plover sites in Benton County. Rather than direct mortality the plovers may just be abandoning these staging areas, perhaps used since the Pleistocene ice sheets retreated.
4. Southeastern South Dakota vic. Yankton. 3-10 May between Ft. Randall and Yankton. Associated here with Upland Sandpipers and American Golden-plovers. Birds once seen commonly as far east as Vermillion on grasslands above Missouri River. There are numerous small sloughs in the area and a fair amount of pastureland. Apparently this was the northernmost major staging area before northern Saskatchewan as the bird was seldom reported from northeastern South Dakota or North Dakota. Base in Yankton.
5. Newfoundland—Labrador. Although the last record was of a pair in 1932, almost every year one or two Canadian birders still visit the former haunts of this species where the species first staged south of its Arctic breeding range, feeding mainly on crowberries. Sites to try include Battle Harbor, Hamilton Inlet entrance (where they normally arrived on 23rd August), Henley Harbor, Indian Tickle, Isle of Ponds, Curlew Harbor, Table Bay, and Gready Island. This is wonderful, wild, remote country. Access by a ferryboat that visits most of these sites with reservations needed a year or more in advance. Getting to these sites once explored by Audubon is a challenge.
6. Iles de la Madeleine, Quebec. Remote, scenic and sophisticated, this chain of islands connected by sandbars and one road annually hosts thousands of shorebirds in fall including Whimbrel and American Golden-plover. Historically, Eskimo Curlews were regular here between 20 August and 6 September although there are no recent records. Area included because it was on a direct passage route for this curlew and still contains large bog areas replete with abundant berry bushes and hundreds of acres of short-cropped fields and some of the largest sandflats and tidal flats in the hemisphere. Very low level of birding activity and relatively easy to reach (by plane from Montreal or ferry from Prince Edward Island). Excellent motels on French portion of this bilingual island chain in Cap-aux-Meules.
7. Miscou Island, New Brunswick. Immense numbers of this species once frequented the coast from Shediac to Dalhousie with the largest flocks often on this small island at the tip of the province. Still largely unspoiled, the island is covered by dozens of small ponds surrounded by dense stands of many species of subarctic berry bushes upon which the birds reportedly fed. The island has hundreds of shorebirds both as foragers and flybys during August and September. During the heyday of Eskimo Curlews, they reportedly arrived often before the 15th of August and remained until about the 15th of September, departing before the Whimbrel departed. Many observers commented that the years of highest curlew abundance also had prevailing strong easterly gales during the fall. A very small motel is present at the base of the island bridge and other motels are nearby along the Acadian coast.
8. Martha’s Vineyard / Nantucket Island / Monomoy Island, Massachusetts. During periods of east winds these offshore islands of Massachusetts often held hundreds of curlews seeking shelter from the storms. Reported from Martha’s Vineyard on 6-7 August 1972 and 30 August 2002 (Gay Head), a report not accepted by the bird committee but which one committee member described as totally convincing. With 2 (yes 2!) recent reports this island may be the place to head to during east winds in autumn if you can afford the overpriced motels.
9. Portsmouth Island—Cape Lookout National Seashore. This is a gem of a shorebird stopover site, a 40-mile+ long island of sand, sandflats, meadows, and islets as remote as any site on the USA east coast and virtually undisturbed. Stay on neighboring Ocracoke Island, itself well worth checking the south end for shorebirds, and hire the local boat shuttle ($25.00) for the short 15-minute ride over to Portsmouth (includes free lecture on natural history and ineptitude of National Park Service) or get an SUV and take a car ferry over to the Core Banks from the mainland (see Cape Lookout National Seashore website) and drive northward. Almost every shorebird species known in eastern USA has been recorded here. Bring lots of bug spray and sunburn oil and be prepared to walk (or drive—4-wheel drive only) miles. Uninhabited except for a few hunting camps and cabins in the now ghost town of Portsmouth. A recent spring report was made by an expert birder in 1972 at Pea Island north of here, one seen with 3 Whimbrels.
10. Prince Edward Island, Canada. This quiet, lightly-birded island of potato fields, spruce forests, and remote beaches would seem like a likely candidate for hiding migrant curlews. I would concentrate on fields on the east side of the island, the shorebird flats at Prince Edward National Park along the north shore at North Rustico, the Malpeque area where once reported to be very common, and the remote northwest corner of the island where I haven’t yet ventured but looks good on Google Earth. 25 August to 28 September. Base in Charlottetown.
Honorable mentions:
11. Cape Henrietta Maria. Ontario. Very remote but tens of thousands of shorebirds pass this site in southbound migration. Access by air and bring a gun for polar bear protection.
12. Mar Chiquita, Argentina Mar Chiquita is located northeast of the province of Cordoba and is the largest inland saline body of water in Argentina covering roughly 6000 square kilometers with a floodable plain embracing another 4,000 square kilometers. As many as 4 Eskimo Curlews have been reported from here in a single flock in recent decades. The size of the area and the number of birds is overwhelming but this may be the single best spot for searching for wintering birds. Base in the city of Santa Fe or camp along the shores.
13. Mingan Islands, Quebec. Off the north shore of the Gulf of St. Lawrence, these remote islands are reachable by rented boat or kayak. Many shorebirds stage here in late summer but the islands have been rarely ever birded. This is a major staging area for Red Knots in fall. Check out their website at: http://www.canadianparks.com/quebec/minganp/index.htm
14. Sable Island, Nova Scotia. One requires a scientific permit / reason to visit this national treasure far off the Nova Scotian coast. The breeding home of the Ipswich (Savanna Sparrow) and the most remote place in the Maritimes, one could always fake a shipwreck and bird while waiting for possible rescue. If you don’t get rescued, at least be good enough to leave us a detailed description of the curlew you see as your last lifer before expiring so we can publish it and run it by the records committee. Sable Island is a sand bar - 42 km long and roughly 1.5 km wide - located far offshore, approximately 160 km southeast of Canso, Nova Scotia, the nearest landfall. The island has been the focus of human activities, imagination and speculation for roughly 500 years. Shipwrecks, wild horses, seabirds and seals, and inaccessibility have endowed this narrow wind-swept sliver of sand with a special mystique.
15. Barbados (Graeme Hall Swamp and vicinity). The last specimen of Eskimo Curlew was collected by a hunter on 4 September 1963 near this site. The site was a private hunting club and may be still but I have no recent information on its status or current habitat. Nearby Graeme Hall Swamp ($13.00 entrance fee) has hundreds of acres of protected habitat with numerous shorebirds at low tide. Barbados was a bottleneck for the species, a first resting spot for tired birds departing from Maritime Canada and flying over the Atlantic Ocean.
[p.s. there's actually a small Facebook group dedicated to the search for the ESCU, as well.]
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Wednesday, June 22, 2011
-- "Its Physical Prowess..." --
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(image, from 1935, via Wikipedia Commons)
"Looking for an ivory-bill today takes the mediating nature of birdwatching to an even higher level, because in this case the quarry is a kind of ghost bird, a creature that does and does not exist. Birds have always been emblems that shuttled between the natural world and the man-made world, between science and poetry, between earth and sky. But the ivory-bill is even more of an in-between figure --- flying between the world of the living and the world of the dead, between the American wilderness and the modern wasteland, between faith and doubt, survival and extinction. No wonder the bird has taken on a sort of mystical character. Its physical prowess made it king of the woodpeckers. But is it a once and future king?"
(image, from 1935, via Wikipedia Commons)
"Looking for an ivory-bill today takes the mediating nature of birdwatching to an even higher level, because in this case the quarry is a kind of ghost bird, a creature that does and does not exist. Birds have always been emblems that shuttled between the natural world and the man-made world, between science and poetry, between earth and sky. But the ivory-bill is even more of an in-between figure --- flying between the world of the living and the world of the dead, between the American wilderness and the modern wasteland, between faith and doubt, survival and extinction. No wonder the bird has taken on a sort of mystical character. Its physical prowess made it king of the woodpeckers. But is it a once and future king?"
-- Jonathan Rosen "The Life of the Skies" 2008-----------------------------------------------------------------
Friday, June 17, 2011
-- Replaying A Li'l History --
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From Christopher Cokinos' "Hope Is the Thing With Feathers":
From Christopher Cokinos' "Hope Is the Thing With Feathers":
"That same month, apparently on April 15 [1932], a Louisiana state legislator and attorney named Mason D. Spencer, a man with a penchant for bars and gambling, raised his gun, looked through the sight and squeezed the trigger. He collected his specimen -- triumphantly (and legally, for he had a permit) -- then prepared it for safekeeping.-----------------------------------------------------------------------
"Officals in the New Orleans headquarters of the state's conservation department had scorned verbal reports of Ivory-bills along the Tensas River in Madison Parish, joking about the quality of moonshine available there. These officials could hardly believe their eyes when they found themselves looking at Spencer's specimen: a freshly-killed Ivory-billed Woodpecker...
"...In early April [1935], the expedition trucks [from Cornell] pulled into the only town in Madision Parish, Louisiana, that had electricity -- tiny Tallulah, due west of Vicksburg. There the men conferred with Mason D. Spencer, the attorney who had shot the Ivory-bill in Madsion Parish three years before, and with the game warden, J.J. Kuhn, who later would aid Tanner in his Ivory-bill fieldwork and who is remembered today, years after his death, as a 'remarkable' and 'marvelous' woodsman.
"Allen, Kellogg, Tanner and Sutton crowded into Spencer's law office in Tallulah and studied the maps of the area spread before them. Spencer spoke of wolves -- more numerous here, he claimed, than anywhere else in the United States -- and of panthers and black bears. A Southerner born and bred, Spencer cautioned the visiting Yankees about mosquitoes and the ease with which one can get disoriented in the forest bayous of the Tensas River. And, no doubt, he corrected their pronunciation. It's the Ten-saw, not Ten-sas. 'The talk,' recalled Sutton, ' ...kept us on the edge of our chairs. There could be no doubt that we were in a fearful and wonderful country.'
"Spencer also spoke of 'Kints' -- the local name for the Ivory-billed Woodpecker -- and bristled when Sutton pressed him on the matter. Sutton worried, as did the others, that Spencer could be misidentifying the common and widespread Pileated Woodpecker for the somewhat similar Ivory-bill...
But not Mason Spencer.
'Man alive! These birds I'm tellin' you all about is Kints!' Sutton recalled Spencer saying. 'Why, the Pileated Woodpecker's just a little bird about as big as that.' Spencer used his fingers to show a tiny bird, though the Pileated was in fact only somewhat smaller than the Ivory-bill. Spreading his arms, Spencer yelled, 'And a Kint's as big as that! Why, man, I've known Kints all my life. My pappy showed 'em to me when I was just a kid. I see 'em every fall when I go deer huntin' down aroun' my place on the Tinsaw. They're big birds, I tell you, big and black and white; and they fly through the woods like Pintail Ducks!' "
Thursday, June 16, 2011
-- ...Risking Belief --
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Bruce Tindall on the 'taunting' Ivory-billed Woodpecker:
http://www.versedaily.org/lastivory.shtml
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Bruce Tindall on the 'taunting' Ivory-billed Woodpecker:
http://www.versedaily.org/lastivory.shtml
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Wednesday, June 15, 2011
-- NPR on the Ivory-bill circa 1996 --
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Transcript of an old (1996) radio edition of NPR's "Living On Earth," with good cast of characters, on the Ivory-billed Woodpecker (before the Big Woods story, and even before David Kulivan):
http://tinyurl.com/429c39n
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Transcript of an old (1996) radio edition of NPR's "Living On Earth," with good cast of characters, on the Ivory-billed Woodpecker (before the Big Woods story, and even before David Kulivan):
http://tinyurl.com/429c39n
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Friday, June 10, 2011
-- For Your Weekend Viewing --
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Scott Crocker's "Ghost Bird" is now up on the Web, in it's entirety (85 mins.), at this learning site:
http://learning.snagfilms.com/film/ghost-bird
(I'm assuming this is a legitimate showing... if it is pirated or otherwise unauthorized someone let me know that and I'll remove the link).
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Scott Crocker's "Ghost Bird" is now up on the Web, in it's entirety (85 mins.), at this learning site:
http://learning.snagfilms.com/film/ghost-bird
(I'm assuming this is a legitimate showing... if it is pirated or otherwise unauthorized someone let me know that and I'll remove the link).
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Thursday, June 09, 2011
-- Bookshelf --
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I suspect (hope) the very best books about the Ivory-billed Woodpecker may not yet have been written... but, of the volumes already out there touching on the subject, my favorites, in order of preference, are as follows:
1) The Search For the Ivory-billed Woodpecker -- Jerome A. Jackson
2) The Ivory-billed Woodpecker -- James T. Tanner
3) The Race To Save the Lord God Bird -- Phillip Hoose
4) The Travails of Two Woodpeckers -- Noel F.R. Snyder, David E. Brown, Kevin B. Clark
5) The Grail Bird -- Tim Gallagher
6) Life Histories of North American Woodpeckers -- Arthur C. Bent
7) Hope Is the Thing With Feathers -- Christopher Cokinos
8) Ghost Birds -- Stephen Lyn Bales
9) Stalking the Ghost Bird --Michael Steinberg
10) Ivorybill Hunters -- Geoffrey E. Hill
11) The Black Swan -- Nassim N. Taleb ;-)
For now, I continue to believe that the claims of certain individuals over the last several years (and prior), indicate persistence of the Ivory-billed Woodpecker, BUT having said that, of all the players in this saga, the two individuals who's overall judgment I most trust at this late point (and perhaps the only two!) are Jerry Jackson and Noel Snyder, both of whom, counter to my notion, appear extremely doubtful about continued IBWO presence.
Hopefully, individuals with the interest and opportunity to continue searching for the species will do so... while being under no illusion as to the magnitude of the task before them. Those especially who are already on public record as saying they've seen the bird may bear a special responsibility to further pursue definitive evidence backing-up such claims, lest their names go down in birding history forever with an asterisk by it (and, accompanying snickers)....
-------------------------------------------------------------------------
I suspect (hope) the very best books about the Ivory-billed Woodpecker may not yet have been written... but, of the volumes already out there touching on the subject, my favorites, in order of preference, are as follows:
1) The Search For the Ivory-billed Woodpecker -- Jerome A. Jackson
2) The Ivory-billed Woodpecker -- James T. Tanner
3) The Race To Save the Lord God Bird -- Phillip Hoose
4) The Travails of Two Woodpeckers -- Noel F.R. Snyder, David E. Brown, Kevin B. Clark
5) The Grail Bird -- Tim Gallagher
6) Life Histories of North American Woodpeckers -- Arthur C. Bent
7) Hope Is the Thing With Feathers -- Christopher Cokinos
8) Ghost Birds -- Stephen Lyn Bales
9) Stalking the Ghost Bird --Michael Steinberg
10) Ivorybill Hunters -- Geoffrey E. Hill
11) The Black Swan -- Nassim N. Taleb ;-)
For now, I continue to believe that the claims of certain individuals over the last several years (and prior), indicate persistence of the Ivory-billed Woodpecker, BUT having said that, of all the players in this saga, the two individuals who's overall judgment I most trust at this late point (and perhaps the only two!) are Jerry Jackson and Noel Snyder, both of whom, counter to my notion, appear extremely doubtful about continued IBWO presence.
Hopefully, individuals with the interest and opportunity to continue searching for the species will do so... while being under no illusion as to the magnitude of the task before them. Those especially who are already on public record as saying they've seen the bird may bear a special responsibility to further pursue definitive evidence backing-up such claims, lest their names go down in birding history forever with an asterisk by it (and, accompanying snickers)....
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Wednesday, June 08, 2011
-- Priceless... --
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(from Phillip Hoose's "The Race To Save the Lord God Bird")
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A.T. Wayne's [19th century collector] Sample Price List as of July 29, 1893:
Ivory-billed Woodpecker, male and female $22.00
Mississippi Kite, price reduced 2.00
4 Carolina Paroquets, adults 15.00
1 (Carolina) Paroquets, immature 3.50
3 South Carolina Swifts @ .50 1.50
1 Scott's Sparrow 1.25
1 Red-eyed Vireo .25
1 Yellow-throated Vireo .30
1 Acadian Flycatcher .35
1 Bachman's Warbler 2.50
1 Parula Warbler, Blue Head 1.00
1 Black-poll Warbler .25
1 Worm-eating Warbler .50
4 Manau's Marsh Wrens 3.20
(from Phillip Hoose's "The Race To Save the Lord God Bird")
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Saturday, June 04, 2011
-- Campephysics Principalis ;-) --
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Here's another odd photo (pileated woodpecker) showing how lighting can play tricks on perception:
http://natureinquiries.wordpress.com/2011/04/11/schrodinger%E2%80%99s-woodpecker/
The analogy to 'Schrodinger's cat' has also of course been made repeatedly to the Ivory-billed Woodpecker. Another, more-current analogy one might make though is to the Higgs Boson. I'm not competent to describe the technicalities of the Higgs, but simply put, years and years of tangential evidence has indicated its likely existence, yet no proof of it has been forthcoming -- one of the major goals of the much-publicized Large Hadron Collider is to establish the presence of this elementary particle (known popularly as "the God particle"... hmmm, echoes of "the Lord God Bird"). Both the LHC and its rival, the Tevatron collider in the US, have recently found rumored evidence (still being analyzed) for the Higgs, after decades of theorizing and failed searches. Hints, glimpses, findings, calculations, debates... but still awaiting proof.
I'll confess my bias: Schrodinger's cat is mostly an abstract thought exercise... I suppose I prefer an analogy to the Higgs, because so many of those in the know feel sure it is really there, and just a matter of time before that is patiently demonstrated... may it still be so for the Ivory-bill... not Schrodinger's Woodpecker, but Higgs.
-----------------------------------------------------------------------
Here's another odd photo (pileated woodpecker) showing how lighting can play tricks on perception:
http://natureinquiries.wordpress.com/2011/04/11/schrodinger%E2%80%99s-woodpecker/
The analogy to 'Schrodinger's cat' has also of course been made repeatedly to the Ivory-billed Woodpecker. Another, more-current analogy one might make though is to the Higgs Boson. I'm not competent to describe the technicalities of the Higgs, but simply put, years and years of tangential evidence has indicated its likely existence, yet no proof of it has been forthcoming -- one of the major goals of the much-publicized Large Hadron Collider is to establish the presence of this elementary particle (known popularly as "the God particle"... hmmm, echoes of "the Lord God Bird"). Both the LHC and its rival, the Tevatron collider in the US, have recently found rumored evidence (still being analyzed) for the Higgs, after decades of theorizing and failed searches. Hints, glimpses, findings, calculations, debates... but still awaiting proof.
I'll confess my bias: Schrodinger's cat is mostly an abstract thought exercise... I suppose I prefer an analogy to the Higgs, because so many of those in the know feel sure it is really there, and just a matter of time before that is patiently demonstrated... may it still be so for the Ivory-bill... not Schrodinger's Woodpecker, but Higgs.
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Wednesday, June 01, 2011
-- Something New and Something Old --
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Yet another Ivory-billed inspired work (novel) on the way, in July, here:
http://26yearstolive.blogspot.com/2011/05/of-wing-ivory-billed-obsession.html
(see also: http://www.ofthewing.com/new.htm )
And as a reminder as to why the bar of evidence for this bird is now set so very high (clear photos will be assumed inauthentic until demonstrated otherwise), this old 'anybody can do this' post from Mark Bailey:
http://hogfoot.blogspot.com/2009/03/ivorybill-photo-hoax.html
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Yet another Ivory-billed inspired work (novel) on the way, in July, here:
http://26yearstolive.blogspot.com/2011/05/of-wing-ivory-billed-obsession.html
(see also: http://www.ofthewing.com/new.htm )
And as a reminder as to why the bar of evidence for this bird is now set so very high (clear photos will be assumed inauthentic until demonstrated otherwise), this old 'anybody can do this' post from Mark Bailey:
http://hogfoot.blogspot.com/2009/03/ivorybill-photo-hoax.html
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Tuesday, May 31, 2011
-- 'Honking Woodpeckers' --
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A year+-old interview over at another blog (I may have linked to previously) with Jerry Jackson:
http://www.natureskills.com/birds/ivory-billed-woodpecker/
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A year+-old interview over at another blog (I may have linked to previously) with Jerry Jackson:
http://www.natureskills.com/birds/ivory-billed-woodpecker/
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