The original recording was from south-central Alabama in the early morning
(~4AM) of October 8, 1989. Andy cut out the dead space between calls. The
actual sequence is over a minute long and one can interpret the bird
approaching and then flying away. This is the only time I've heard a double
croak from American Bittern -- all other occasions have been single croak
events. I think on most of my night flight call recordings there is usually
only a single call detected from a passing individual. Uncommon but regular
flight call here in central NY.
Bill E
----- Original Message -----
From: "Andrew Farnsworth" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>; "Bill Evans" <[email protected]>
Sent: Thursday, October 06, 2011 1:38 PM
Subject: Re: [nfc-l] American Bittern NFC
Hi all,
I've certainly heard American Bittern produce isolated notes more
often than not when I've heard them migrating at night, both in the
field and in the lab from recordings; I'd hazard a guess to say that
the single note call is more likely to be encountered . . . but this
is really pure speculation, when it comes down to it, because I've not
heard a tremendous number of bitterns in flight at night!
Best,
Andrew
On Thu, Oct 6, 2011 at 12:11, Chris Tessaglia-Hymes <[email protected]>
wrote:
Andrew,
Thanks for pulling this together, and thanks Bill, for providing these
clips!
Is it most typical for American Bitterns to produce these paired calls
during migration, or do they often just do single isolated notes?
This is very helpful!
Thanks again!
Sincerely,
Chris T-H
--
Christopher T. Tessaglia-Hymes
TARU Product Line Manager and Field Applications Engineer
Bioacoustics Research Program, Cornell Lab of Ornithology
159 Sapsucker Woods Road, Ithaca, New York 14850
W: 607-254-2418 M: 607-351-5740 F: 607-254-1132
http://www.birds.cornell.edu/brp
-----Original Message-----
From: Andrew Farnsworth [mailto:[email protected]]
Sent: Thursday, October 06, 2011 11:59 AM
To: Chris Tessaglia-Hymes
Cc: [email protected]; Bill Evans
Subject: Re: [nfc-l] American Bittern NFC
Hi all,
With Bill Evans's permission, I attach a heavily edited cut of American
Bittern flight calls that Bill recorded and sent to me - I believe these
recordings come from Minnesota, though I cannot say for sure without some
further investigation. This is certainly the best recording I have, I am
not sure and have not yet checked if others exist in Macaulay or
Xeno-Canto.
Best,
Andrew
On Thu, Oct 6, 2011 at 09:59, Chris Tessaglia-Hymes <[email protected]>
wrote:
Does anyone have an example of an American Bittern NFC they could
attach and post to the List?
Thanks!
Sincerely,
Chris T-H
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