[MDOsprey] Bicknell's Thrush in Frederick County

Hershberger, Wilbur (WHershbe@afrs.ars.usda.gov)
Tue, 14 Sep 1999 10:17:07 -0400 

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After 5 straight days of getting up at 4 AM and sitting in a dew covered
field at Audrey Carroll Wildlife Preserve in Frederick County, I heard
and recording the passing of a Bicknell's thrush.
Swainson's thrushes were very numerous, with hundreds of calls during
the hour of 5:15 - 6:15 AM.
Veerys were a close second followed by a few Wood thrushes and only a
handful of Hermits.
However, on Monday morning a distant call had that "sliding,
two-syllabled sense" and the spectrogram proved it to be a Bicknell's.
Last year at this time there were several BITHs heard flying over ACWP
as well as reports from Ospreyers observing them in the state.
Attached is an image that compares the call I heard on Monday morning
with a call recorded in upstate NY by Bill Evans as published on his
tape, "Nocturnal Flight Calls of Migrating Thrushes" 1990.
Wilbur Hershberger
Fred. Co.

Well, it appears that postings with images are not posted to the
LISTSERV
SO, I will post the image at a web site TBA

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After 5 straight days of getting up at 4 AM and sitting in a dew covered field at Audrey Carroll Wildlife Preserve in Frederick County, I heard and recording the passing of a Bicknell's thrush.
Swainson's thrushes were very numerous, with hundreds of calls during the hour of 5:15 - 6:15 AM.
Veerys were a close second followed by a few Wood thrushes and only a handful of Hermits.
However, on Monday morning a distant call had that "sliding, two-syllabled sense" and the spectrogram proved it to be a Bicknell's.
Last year at this time there were several BITHs heard flying over ACWP as well as reports from Ospreyers observing them in the state.
Attached is an image that compares the call I heard on Monday morning with a call recorded in upstate NY by Bill Evans as published on his tape, "Nocturnal Flight Calls of Migrating Thrushes" 1990.
Wilbur Hershberger
Fred. Co.
 
Well, it appears that postings with images are not posted to the LISTSERV
SO, I will post the image at a web site TBA 

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