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New book is out from The Explorer's Club entitled "They Lived to Tell the Tale," including, among its 41 entries, a chapter by Bobby Harrison on his Ivory-bill encounters.
....on a sidenote, almost any great scientist will tell you that intuition, and not logic or reason, is really what underlies most good science --- a topic I suspect worth a post of its own at a certain point in the future....
("It is through science that we prove, but through intuition that we discover." -- J. H. Poincare)
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Elsewhere on the Web:
The Wisconsin Green-breasted Mango (hummingbird), mentioned here previously, has been captured and taken to a wildlife rehabilitation center for now, not due to any injury or health problem, but on the supposition that it could not survive oncoming cold temps, nor have time to reach a warmer clime. I'm not sure I agree with this action, which is stirring a lot of debate, but IF it is a correct decision it is probably because my original surmise that the bird arrived in WI. via false passage in the trailer of a freight truck and not under its own direction is correct. A truly vagrant hummingbird, following its instincts, would likely have left the area ahead of a cold front in enough time to reach warmer temps; whereas a confused and possibly weakened hummer (that may have spent 24 hrs. in a tractor trailer), might not do so and in fact be in need of assistance. But either way, this is a rather unusual and controversial development.
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==> THE blog devoted, since 2005, to news & commentary on the most iconic bird in American ornithology, the Ivory-billed Woodpecker (IBWO)... and sometimes other schtuff [contact: cyberthrush@gmail.com]
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Wednesday, November 07, 2007
Tuesday, November 06, 2007
-- Wattensaw Redux --
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Reminder-time again: Noel Snyder's new monograph, "An Alternative Hypothesis for the Cause of the Ivory-billed Woodpecker's Decline," ($25) is available here :
http://www.wfvz.org/html/pub_prog.html
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Over the years, living in several different states, and associated with different birding groups, I've regularly run into birders (long before the current IBWO interest) who related stories about seeing possible Ivory-billed Woodpeckers in the 60's or 70's, or knowing other people they trusted who thought they may have seen one. These were all encounters that were never officially turned in to anyone, due to lack of documentation or simple fear of ridicule. It is difficult to know how many such possible claims went unreported prior to the Cornell announcement, but probably in the 100's across the entire Southeast over decades.
Anyway, in that vein, "MMinNY" over at IBWO Searchers Forum has found this simple, pertinent entry (which I'd never seen before) from a Jan. 2002 hunting forum thread (discussing the 1999 Kulivan IBWO sighting), from one "ncboman" --- interesting because it makes reference to Wattensaw (Arkansas) 30+ years before Wattensaw became a sudden center of attention with several sightings claims:
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Reminder-time again: Noel Snyder's new monograph, "An Alternative Hypothesis for the Cause of the Ivory-billed Woodpecker's Decline," ($25) is available here :
http://www.wfvz.org/html/pub_prog.html
................................................................................
Over the years, living in several different states, and associated with different birding groups, I've regularly run into birders (long before the current IBWO interest) who related stories about seeing possible Ivory-billed Woodpeckers in the 60's or 70's, or knowing other people they trusted who thought they may have seen one. These were all encounters that were never officially turned in to anyone, due to lack of documentation or simple fear of ridicule. It is difficult to know how many such possible claims went unreported prior to the Cornell announcement, but probably in the 100's across the entire Southeast over decades.
Anyway, in that vein, "MMinNY" over at IBWO Searchers Forum has found this simple, pertinent entry (which I'd never seen before) from a Jan. 2002 hunting forum thread (discussing the 1999 Kulivan IBWO sighting), from one "ncboman" --- interesting because it makes reference to Wattensaw (Arkansas) 30+ years before Wattensaw became a sudden center of attention with several sightings claims:
"I still think I may have seen 3 ivory bills in 1973 at a place in Arkansas called Wattensaw? I was over 100 yds. away and could not make a positive ID. Being new to the area, I wasn't sure what was there but I had already seen good numbers of Pileated woodpeckers and I know these birds were different.(the actual thread is archived here, with the above post at bottom of page)
Being young and stupid, I didn't go to them, preferring to stay in my stand. I wish I had checked them out more closely now. "
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Monday, November 05, 2007
-- 'nother Claim Detailed --
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News story on another IBWO claimant, biologistRichard Robert Anderson (auditory and sighting encounters), here.
And British birders may want to take note that Dr. Dan Mennill, associated with the Auburn Ivory-billed Woodpecker search in the Florida panhandle, as chief sound analyst, is speaking Nov. 16 at the McIlwraith Field Naturalists of London Conservation Awards Banquet. 'NOTHER CORRECTION: myyyyyyy bad; this is in London, ONTARIO (Canada), not Britain!! (...I'll try to get more sleep in the future).
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News story on another IBWO claimant, biologist
And British birders may want to take note that Dr. Dan Mennill, associated with the Auburn Ivory-billed Woodpecker search in the Florida panhandle, as chief sound analyst, is speaking Nov. 16 at the McIlwraith Field Naturalists of London Conservation Awards Banquet. 'NOTHER CORRECTION: myyyyyyy bad; this is in London, ONTARIO (Canada), not Britain!! (...I'll try to get more sleep in the future).
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Saturday, November 03, 2007
-- Of Mangos and Dead Horses --
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For those who don't already know, Green-breasted Mangos are large flashy hummingbirds of Central America, occasionally documented in the US. One was recently confirmed in Georgia, an interesting find to be sure. Most that have ventured into the US over the years though, have been found in Texas (16 or more), not a far cry out of their range, and thusly not so difficult to account for. But in the past, one such bird was documented in western North Carolina and, 7 years later, another in Wisconsin. The probability of a Mango, by its own volition, making it as far north as WI., or even NC. (when they've not been seen anywhere north of Texas) I believe is vanishingly small, and so have always presumed these two individuals likely got trapped in the back of carrier trucks (possibly hauling tropical plants, as there are many trucks moving south to north doing such) and released when the sliding back door opened upon destination arrival. 'Little brown jobs' (sparrows and wrens) get trapped in the back of large trucks with some regularity and there's no particular reason it couldn't have happened twice (or more) to Mangos in 7 years --- in fact, I think it far more probabilistic than any other explanation. Thus, I find it interesting that David Sibley actually believes it more likely these two birds are true vagrants, which I would term "wishful thinking" ;-) pretty much unsupported by any evidence (such as intervening sightings between Texas and farther north). But of course neither of us can know for sure...
But it got me to thinking... what would it take to convince me there really were vagrant Mangos traveling so far north? --- It would take 'numbers;' i.e. not 1 or 2 isolated cases, but a half-dozen of them, in a more condensed time-frame, showing up in northerly locales --- that might begin to be persuasive that something really is going on here other than the randomness of the long haul freight industry.
AND AGAIN, (you knew I was headed somewhere with this ;-) THAT is what we have with Ivory-billed Woodpeckers --- numbers --- 1 or 3 or 5 or even a dozen sightings over the many years might easily be written off as mistakes, but not so likely for the dozens of claims piled up over that elapsed time (NOT all of which are brief, or undetailed, or from non-credible sources, or coming in the middle of IBWO frenzy, despite what some will say).
I'm beating a dead horse here with those who disagree, but I'll repeat it nonetheless: UNTIL there are adequately thorough searches of a majority of pertinent habitat areas, and while sightings continue to infrequently occur, there is NO SOLID EVIDENCE for the extinction of this species (just solid evidence of rarity). Invoking the fact that birders make mistakes as a blanket explanation for so many varied claims across time, is almost insultingly simplistic; a catchall explanation that can be used for anything. And again, if skeptics truly believe that 'brief' identifications are so regularly UNreliable, than I challenge them to come out foursquare against the inclusion of brief sightings on any-and-all official bird counts --- such reports should have no place in databases if their unreliability is as commonplace as painted (funny thing, that brief sightings are accepted so routinely on count days; brief looks of Pileateds are apparently never subject to error, and brief looks of IBWO are 100% subject to error).
If several more years of significant searching result in no documentation for Ivory-bills I'll have no problem saying it looks as though the species may be extinct afterall (though I'll still have no idea in which decade the extinction occurred). And some of us can then say with a clear conscience that we gave it our all, and erred on the side of the bird. But if in that time the species is confirmed what will skeptics have to say...? "geee, sorry, my baaaad," or will some of them be sooo busy packing their bags for a swing by the swamp to get a look just so they can check it off their (unvalidated) lifelists, to bother saying anything at all --- and I'll just bet, by that point, in their estimation, a 2-second look will have magically become plenty sufficient time for putting it on that lifelist, and recounting their wonderful story 100 times over when they return home....
P.S.... in all of this, I don't mean to sound overly harsh with David S.; he's easily one of the most civil and well-spoken folks in these whole proceedings... but this doesn't mean, as I'm sure he'd admit, that he might not be 'mistaken' about both the Green-breasted Mango and the Ivory-billed Woodpecker.
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For those who don't already know, Green-breasted Mangos are large flashy hummingbirds of Central America, occasionally documented in the US. One was recently confirmed in Georgia, an interesting find to be sure. Most that have ventured into the US over the years though, have been found in Texas (16 or more), not a far cry out of their range, and thusly not so difficult to account for. But in the past, one such bird was documented in western North Carolina and, 7 years later, another in Wisconsin. The probability of a Mango, by its own volition, making it as far north as WI., or even NC. (when they've not been seen anywhere north of Texas) I believe is vanishingly small, and so have always presumed these two individuals likely got trapped in the back of carrier trucks (possibly hauling tropical plants, as there are many trucks moving south to north doing such) and released when the sliding back door opened upon destination arrival. 'Little brown jobs' (sparrows and wrens) get trapped in the back of large trucks with some regularity and there's no particular reason it couldn't have happened twice (or more) to Mangos in 7 years --- in fact, I think it far more probabilistic than any other explanation. Thus, I find it interesting that David Sibley actually believes it more likely these two birds are true vagrants, which I would term "wishful thinking" ;-) pretty much unsupported by any evidence (such as intervening sightings between Texas and farther north). But of course neither of us can know for sure...
But it got me to thinking... what would it take to convince me there really were vagrant Mangos traveling so far north? --- It would take 'numbers;' i.e. not 1 or 2 isolated cases, but a half-dozen of them, in a more condensed time-frame, showing up in northerly locales --- that might begin to be persuasive that something really is going on here other than the randomness of the long haul freight industry.
AND AGAIN, (you knew I was headed somewhere with this ;-) THAT is what we have with Ivory-billed Woodpeckers --- numbers --- 1 or 3 or 5 or even a dozen sightings over the many years might easily be written off as mistakes, but not so likely for the dozens of claims piled up over that elapsed time (NOT all of which are brief, or undetailed, or from non-credible sources, or coming in the middle of IBWO frenzy, despite what some will say).
I'm beating a dead horse here with those who disagree, but I'll repeat it nonetheless: UNTIL there are adequately thorough searches of a majority of pertinent habitat areas, and while sightings continue to infrequently occur, there is NO SOLID EVIDENCE for the extinction of this species (just solid evidence of rarity). Invoking the fact that birders make mistakes as a blanket explanation for so many varied claims across time, is almost insultingly simplistic; a catchall explanation that can be used for anything. And again, if skeptics truly believe that 'brief' identifications are so regularly UNreliable, than I challenge them to come out foursquare against the inclusion of brief sightings on any-and-all official bird counts --- such reports should have no place in databases if their unreliability is as commonplace as painted (funny thing, that brief sightings are accepted so routinely on count days; brief looks of Pileateds are apparently never subject to error, and brief looks of IBWO are 100% subject to error).
If several more years of significant searching result in no documentation for Ivory-bills I'll have no problem saying it looks as though the species may be extinct afterall (though I'll still have no idea in which decade the extinction occurred). And some of us can then say with a clear conscience that we gave it our all, and erred on the side of the bird. But if in that time the species is confirmed what will skeptics have to say...? "geee, sorry, my baaaad," or will some of them be sooo busy packing their bags for a swing by the swamp to get a look just so they can check it off their (unvalidated) lifelists, to bother saying anything at all --- and I'll just bet, by that point, in their estimation, a 2-second look will have magically become plenty sufficient time for putting it on that lifelist, and recounting their wonderful story 100 times over when they return home....
P.S.... in all of this, I don't mean to sound overly harsh with David S.; he's easily one of the most civil and well-spoken folks in these whole proceedings... but this doesn't mean, as I'm sure he'd admit, that he might not be 'mistaken' about both the Green-breasted Mango and the Ivory-billed Woodpecker.
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Friday, November 02, 2007
-- A Little Bedtime Reading --
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'Fangsheath' over at IBWO Researchers Forum has added a thread to that forum compiling in one spot much of the major published material relating to the Ivory-billed Woodpecker:
http://www.ibwo.net/forum/showthread.php?p=3209#post3209
Several of the pieces are directly accessible on the Web by given links. I've added a link to this thread on the left of my blog, right above the 'IBWO Resources' link, which also comes from IBWO Researchers Forum (there is some content overlap between the two links).
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'Fangsheath' over at IBWO Researchers Forum has added a thread to that forum compiling in one spot much of the major published material relating to the Ivory-billed Woodpecker:
http://www.ibwo.net/forum/showthread.php?p=3209#post3209
Several of the pieces are directly accessible on the Web by given links. I've added a link to this thread on the left of my blog, right above the 'IBWO Resources' link, which also comes from IBWO Researchers Forum (there is some content overlap between the two links).
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Wednesday, October 31, 2007
-- Old Quotes Revisited --
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Not much news, so I'll just repeat a couple of old 1930's quotes from T. Gilbert Pearson, one of the premier American naturalists/ornithologists of the 20th century :
Elsewhere on the Web:
Most folks in the east have taken down their hummingbird feeders by now, assuming the Ruby-throats have made their way south, but as many know, more and more western hummingbirds are almost routinely showing up in the east each winter in regular, if sparse, occurrences. So put that feeder back up, keep it filled with fresh sugar water (and try to keep from freezing), and watch what shows up. Moreover, many people around are intently studying the phenomena/movement of winter hummers in the east, so If you're actually lucky enough to get one, try finding an appropriate person in your area, or on the Web, to report it to. More info here (and there is a LOT of other info on the Web):
http://ebird.org/content/ebird/news/Late_hummingbirds.html
And here's a beaut of an example from current news! (a Green-breasted Mango banded in Georgia recently):
http://www.narba.org/index.cfm/MenuItemID/144.htm
(hmmmm.... hummingbirds in winter.... gotta wonder how long they'd been coming before skeptics accepted it....?)
Not much news, so I'll just repeat a couple of old 1930's quotes from T. Gilbert Pearson, one of the premier American naturalists/ornithologists of the 20th century :
"The supreme moment of my life as a bird student came in May, 1932, when in a great primeval forest in northern Louisiana, I saw, for the first time, a living ivory-billed woodpecker... The ivory-bill is decidedly larger than the pileated, and this difference in size is very apparent, as we had ample opportunity to observe, when by chance birds of both species fed at the same time on a tall decayed stump within 80 feet of our hiding place."...........................................................................................
"The reduction in abundance in this species is due most probably to persecution by man, as the species has been shot relentlessly without particular cause except curiosity and a desire for the feathers or beaks."
Elsewhere on the Web:
Most folks in the east have taken down their hummingbird feeders by now, assuming the Ruby-throats have made their way south, but as many know, more and more western hummingbirds are almost routinely showing up in the east each winter in regular, if sparse, occurrences. So put that feeder back up, keep it filled with fresh sugar water (and try to keep from freezing), and watch what shows up. Moreover, many people around are intently studying the phenomena/movement of winter hummers in the east, so If you're actually lucky enough to get one, try finding an appropriate person in your area, or on the Web, to report it to. More info here (and there is a LOT of other info on the Web):
http://ebird.org/content/ebird/news/Late_hummingbirds.html
And here's a beaut of an example from current news! (a Green-breasted Mango banded in Georgia recently):
http://www.narba.org/index.cfm/MenuItemID/144.htm
(hmmmm.... hummingbirds in winter.... gotta wonder how long they'd been coming before skeptics accepted it....?)
Tuesday, October 30, 2007
-- Extinct in 1931 --
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fer shuuuuur....
A poster on the Arkansas listserv writes about an old book find from 1931 already referring to the Ivory-billed Woodpecker as extinct, well before the Singer Tract study:
http://birdingonthe.net/mailinglists/ARKS.html#1193619323
Of course this species was thought extinct in many minds by 1900, then again by 1920, then by 1930, and then again by 1950, only to be followed by more decades of reports. It's entire history is that of a species prematurely declared gone by the impatient and short-sighted, based upon little solid evidence. Evidence for 'rarity' is one thing, and not so difficult to document; evidence for 'extinction' is quite another, and exceedingly difficult to establish. One ought tread carefully.
....and one last time (well, may do another reminder in a week), Noel Snyder's monograph on Ivory-billed Woodpecker decline available here. It has a limited initial printing so may want to get any orders in early, although if enough demand, could get a second printing.
..............................................................................
Web Grab Bag offering: The new biography of Roger Tory Peterson by Douglas Carlson is now out. I prefer folks support their local bookstores if practical, but nonetheless here is the Amazon link.
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fer shuuuuur....
A poster on the Arkansas listserv writes about an old book find from 1931 already referring to the Ivory-billed Woodpecker as extinct, well before the Singer Tract study:
http://birdingonthe.net/mailinglists/ARKS.html#1193619323
Of course this species was thought extinct in many minds by 1900, then again by 1920, then by 1930, and then again by 1950, only to be followed by more decades of reports. It's entire history is that of a species prematurely declared gone by the impatient and short-sighted, based upon little solid evidence. Evidence for 'rarity' is one thing, and not so difficult to document; evidence for 'extinction' is quite another, and exceedingly difficult to establish. One ought tread carefully.
....and one last time (well, may do another reminder in a week), Noel Snyder's monograph on Ivory-billed Woodpecker decline available here. It has a limited initial printing so may want to get any orders in early, although if enough demand, could get a second printing.
..............................................................................
Web Grab Bag offering: The new biography of Roger Tory Peterson by Douglas Carlson is now out. I prefer folks support their local bookstores if practical, but nonetheless here is the Amazon link.
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