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A new thread of interest (just 3 posts at this moment) was started today on IBWO Researchers Forum dealing with methods employed to search for Ivory-bills:
http://www.ibwo.net/forum/showthread.php?p=1338#post1338
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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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Thursday, March 08, 2007
Wednesday, March 07, 2007
-- Nothing Extraordinary Here --
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Alert readers have sent in this link (and others) to another extinct bird find-of-the-week, a Thailand reed-warbler missing for a mere 130+ years, as it went about living out it's normal life.
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Alert readers have sent in this link (and others) to another extinct bird find-of-the-week, a Thailand reed-warbler missing for a mere 130+ years, as it went about living out it's normal life.
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Tuesday, March 06, 2007
-- Pascagoula, plus... --
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Cornell's mobile search team has posted their experience in the Pascagoula River Basin of Mississippi here, and is now off to survey the Atchafalaya in Louisiana --- one might expect this to be one of their most interesting explorations. Obviously, stay tuned...
Addendum: ...and now Dr. Hill has posted his latest update on the Choc. search here.
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Cornell's mobile search team has posted their experience in the Pascagoula River Basin of Mississippi here, and is now off to survey the Atchafalaya in Louisiana --- one might expect this to be one of their most interesting explorations. Obviously, stay tuned...
Addendum: ...and now Dr. Hill has posted his latest update on the Choc. search here.
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Sunday, March 04, 2007
-- 'Millions of Birders' --
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Probably the single most repeated argument I've heard over the last 40 years as to why Ivory-billed Woodpeckers must be extinct is simply that, 'with so many millions of birders active through America a bird this large couldn't have escaped detection.' To which I politely respond, 'BULLLL-DOOOOKEY!' I see estimates ranging from 24 million to 40+million birders presently in this country, but of course, MOST of those 'birders' will never in their entire lives set forth even momentarily in habitat that might harbor an Ivory-bill. Some will never go beyond their local park or greenway (I'm not critiqueing them for that -- I encourage ALL levels of birding, but just saying...). Only a tiny fraction of birders will spend any significant amount of time in IBWO-like habitat (although certainly more now, than in the decades previous to 2000), so it is hugely disingenuous to imply that huge numbers of knowledgeable people have spent countless hours roaming woodland tempting an encounter with the Lord God bird. Yes, lots of birders have spent some time looking for IBWOs in some places (what I call mostly 'spotchecks') over the decades, but the "millions" of hobbyists around these days is a meaningless figure.
In fact, one could presume that 200 years ago (even though there were far FEWER 'birders'), MORE people who knew what Ivory-bills were (even if they didn't know them by that name), routinely spent far more time in IBWO habitat than do so today even with millions more 'birders' present to do so.
And in a tangential vein one might want to read this recent post by 'Fangsheath' over on IBWO Researchers' Forum which has some relevance here:
http://www.ibwo.net/forum/showpost.php?p=1294&postcount=7
If you haven't been following matters at that Forum 'Fang' is back from an exploratory trip in Louisiana, and you may wish to backtrack for some of his informational posts since returning (mostly in the "Louisiana" thread).
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Probably the single most repeated argument I've heard over the last 40 years as to why Ivory-billed Woodpeckers must be extinct is simply that, 'with so many millions of birders active through America a bird this large couldn't have escaped detection.' To which I politely respond, 'BULLLL-DOOOOKEY!' I see estimates ranging from 24 million to 40+million birders presently in this country, but of course, MOST of those 'birders' will never in their entire lives set forth even momentarily in habitat that might harbor an Ivory-bill. Some will never go beyond their local park or greenway (I'm not critiqueing them for that -- I encourage ALL levels of birding, but just saying...). Only a tiny fraction of birders will spend any significant amount of time in IBWO-like habitat (although certainly more now, than in the decades previous to 2000), so it is hugely disingenuous to imply that huge numbers of knowledgeable people have spent countless hours roaming woodland tempting an encounter with the Lord God bird. Yes, lots of birders have spent some time looking for IBWOs in some places (what I call mostly 'spotchecks') over the decades, but the "millions" of hobbyists around these days is a meaningless figure.
In fact, one could presume that 200 years ago (even though there were far FEWER 'birders'), MORE people who knew what Ivory-bills were (even if they didn't know them by that name), routinely spent far more time in IBWO habitat than do so today even with millions more 'birders' present to do so.
And in a tangential vein one might want to read this recent post by 'Fangsheath' over on IBWO Researchers' Forum which has some relevance here:
http://www.ibwo.net/forum/showpost.php?p=1294&postcount=7
If you haven't been following matters at that Forum 'Fang' is back from an exploratory trip in Louisiana, and you may wish to backtrack for some of his informational posts since returning (mostly in the "Louisiana" thread).
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Saturday, March 03, 2007
-- The Catch-22 of Searching --
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First, new article here on the Choc. search --- an interesting read, but once again largely re-hash, so on to the subject I'd rather currently address:
Bobby Harrison, Mike Collins, and a few others have argued that sudden influxes of noisy humans into the woods simply spook wary Ivory-bills making documentation less likely. Others (including myself) believe the likeliest way to document IBWOs is indeed with large-scale, systematic searches involving many individuals (in fact, I've long regarded the lack of solid documentation from the past as a result of failure to do such systematic searches). Both arguments have some merit. The IBWO is most likely a wary creature that will detect humans long before humans detect it, either ducking into a cavity or flushing well ahead of searchers (...like the bird in the Luneau video). However, the sheer size and difficulty of the land tracts needing exploration make successful 1 or 2-man outings unrealistic in many regards, basically requiring incredible 'luck' --- though from a root-for-the-underdog mentality I'd be thrilled to see one rugged individualist-type put the institutional teams to shame by being the first to attain unarguable photographic evidence of this quarry.
Still I expect the team approach to work best while acknowledging it creates the greatest disturbance for the birds (and in the end, a remote automatic camera may yet be the eventual winner). Search "teams" sometimes operate out of a base camp from which searchers fan out in spoke-like manner to appointed positions, again risking any IBWOs flushing well ahead of the human activity and out of an area. Once a 'hot zone' is determined teams should be posted to the north, south, east, and west of the area, to the degree terrain/topography allows. Then, as searchers advance forward, a suspected IBWO flushing in any direction may yet come into sight-contact with other searchers. The downside may well be greater disruption to the bird itself, and I fully respect those with a view that increased disruption ought not be risked.
On a different note, Bobby Harrison continues to utilize hand-crafted decoys in his searches for the IBWO, while Auburn is now emphasizing man-made 'double-knocks' trying to 'draw in' Ivory-bills to photographic range --- it's odd/disappointing how little such techniques have been employed in the past 60 years --- some have occasionally tried playing "kent" recordings which probably is NOT a good idea --- there are a paucity of kent recordings to choose from and we don't really know what those past recordings may even "mean" to another Ivory-bill; i.e. in 'Ivory-bill language,' for all anyone knows, those recordings may be saying, "THIS is MY territory, all the rest of you IBWOs stay OUTTA here" : - ] Again, too much we simply don't know...
Within a few days, time for another report from Cornell's 'mobile team' with their latest efforts in Mississippi. Their's is largely a scouting and information-gathering mission, and will probably have a lot to say about future searches once this season ends, whatever its results.
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Friday, March 02, 2007
-- Harrison Interview etc.--
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Lengthy online interview with Bobby Harrison from Birder's World magazine here. (May require free registration).
Plenty of grist for the mill here.
And Cornell has placed online the newly-discovered photos of the Cuban Ivory-bill (likely a distinct species or subspecies from the N. American IBWO) they had recently published in their Living Bird Magazine.
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Lengthy online interview with Bobby Harrison from Birder's World magazine here. (May require free registration).
Plenty of grist for the mill here.
And Cornell has placed online the newly-discovered photos of the Cuban Ivory-bill (likely a distinct species or subspecies from the N. American IBWO) they had recently published in their Living Bird Magazine.
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Wednesday, February 28, 2007
-- Another Endangered Species --
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Interesting news on yet another endangered (and once-believed-extinct) avian species, the Sumatran Ground Cuckoo, here. Are these news reports almost becoming routine? In this instance they have recorded the bird's call for the first time ever (...assuming of course that it wasn't in actuality a Blue Jay ; - ) --- actually I suspect this 'shriek' upon human capture may not really be the bird's typical call.
...and for some more sheer avian entertainment/wonderment, while we tread water in IBWO-land, check out Mike McDowell's link in his post of today:
http://www.birddigiscoping.com/2007/02/riflebird-mating-dance.html
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Interesting news on yet another endangered (and once-believed-extinct) avian species, the Sumatran Ground Cuckoo, here. Are these news reports almost becoming routine? In this instance they have recorded the bird's call for the first time ever (...assuming of course that it wasn't in actuality a Blue Jay ; - ) --- actually I suspect this 'shriek' upon human capture may not really be the bird's typical call.
...and for some more sheer avian entertainment/wonderment, while we tread water in IBWO-land, check out Mike McDowell's link in his post of today:
http://www.birddigiscoping.com/2007/02/riflebird-mating-dance.html
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