Ken,
I'm not confident in separting Lincoln's and Swamp either, but last night
was the first night this season that such calls were fairly abundant and I
presume they were Lincoln's due to that species' earlier fall migration
pattern in the region (based on diurnal records).
Your listening site is over 100 miles east of the Alfred Station microphone,
so you undoubtedly had somewhat different species composition -- in the case
of Black-throated Blue one might expect higher proportionate calling rate as
one proceeds eastward in the state.
That said, there were also a lot of short Vermivora calls in the mix last
night, perhaps the first substantial wave of Nashville's. All the calls from
last night are downloadable at:
http://www.oldbird.org/Data/States/NY/Alfred/fall2011/Alfred2011f.htm
Bill
----- Original Message -----
From: "Kenneth Victor Rosenberg" <[email protected]>
To: "Bill Evans" <[email protected]>
Cc: "CAYUGABIRDS-L" <[email protected]>; "NFC-L"
<[email protected]>
Sent: Wednesday, September 21, 2011 11:18 AM
Subject: Re: [nfc-l] big night flight tonight
Thanks Bill. I did hear a few typical "Lincoln's/Swamp sparrow" "dzzzzt"s
but was not confident enough to report. If there were that few
Black-throated Blues, I'm curious what most of the abrupt "tsip" notes might
have been? There were certainly way fewer of what I would consider typical
buzzy Dendroica-type "zeet" notes than what I'm used to hearing on most
nights.
KEN
Ken Rosenberg
Conservation Science Program
Cornell Lab of Ornithology
607-254-2412
607-342-4594 (cell)
[email protected]
On Sep 21, 2011, at 9:55 AM, Bill Evans wrote:
Ken appears to have tuned into one of the biggest calling night of the
season so far in central NY. The acoustic station at Alfred Station, NY
logged its season high number (988) of warbler and sparrow flight calls
last night between 8:30PM-5:30AM. Based on spectrographic analysis roughly
4 out of 100 were Common Yellowthroat, 2 out of 100 were Black-throated
Blue, and 2 out of 100 were Chestnut-sided. Also notably in the mix were
good numbers of presumed Lincoln's Sparrow calls.
Bill E
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