Correction - Re: [nfc-l] Possible Bicknell's Thrushes

2016-09-25 Thread Christopher T. Tessaglia-Hymes 
Correction:  **Westward** shift of birds departing the Adirondacks!




On Sep 25, 2016, at 7:02 PM, Christopher T. Tessaglia-Hymes 
mailto:c...@cornell.edu>> wrote:

On Saturday night, there was a cleanup flight following Friday’s awesome night 
migration. Among the scattering of calls throughout the night, I recorded a 
total of 10 possible Bicknell’s Thrush night flight calls. Each of the calls 
peaked above 4.0 kHz with the highest two calls peaking around 4.8 kHz. While 
none are “clear” Bicknell’s Thrush calls (peaking above 5 kHz), the structure 
of the calls (sharp onset followed by a variably modulated and notably longer 
trailing descent) are very reminiscent of Bicknell’s Thrush call examples which 
are noted in the Evans and O'Brien Flight Calls of Migratory Birds CD-ROM.

Overnight Saturday to Sunday morning, there was a notably Eastern component to 
the winds over Etna, NY. This could potentially account for an Eastward shift 
of birds departing from their mountaintop breeding grounds in the Adirondacks.

While I realize these could arguably be particularly high frequency calls from 
Gray-cheeked Thrushes, it would likewise seem reasonable that these could be 
lower frequency Bicknell’s Thrushes. So much is yet to be learned about sexual- 
and age-related differences in calling frequencies of these two species.

Attached are the first five calls, with the remaining five appearing in a 
separate message to the NFC-L eList.

I welcome any feedback, and good night listening!

Sincerely,
Chris T-H








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Christopher T. Tessaglia-Hymes
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

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Christopher T. Tessaglia-Hymes
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


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[nfc-l] Possible Bicknell's Thrushes - Part 2

2016-09-25 Thread Christopher T. Tessaglia-Hymes 
Attached are the latter five calls pertaining to the message below.


On Saturday night, there was a cleanup flight following Friday’s awesome night 
migration. Among the scattering of calls throughout the night, I recorded a 
total of 10 possible Bicknell’s Thrush night flight calls. Each of the calls 
peaked above 4.0 kHz with the highest two calls peaking around 4.8 kHz. While 
none are “clear” Bicknell’s Thrush calls (peaking above 5 kHz), the structure 
of the calls (sharp onset followed by a variably modulated and notably longer 
trailing descent) are very reminiscent of Bicknell’s Thrush call examples which 
are noted in the Evans and O'Brien Flight Calls of Migratory Birds CD-ROM.

Overnight Saturday to Sunday morning, there was a notably Eastern component to 
the winds over Etna, NY. This could potentially account for an Eastward shift 
of birds departing from their mountaintop breeding grounds in the Adirondacks.

While I realize these could arguably be particularly high frequency calls from 
Gray-cheeked Thrushes, it would likewise seem reasonable that these could be 
lower frequency Bicknell’s Thrushes. So much is yet to be learned about sexual- 
and age-related differences in calling frequencies of these two species.

Attached are the first five calls, with the remaining five appearing in a 
separate message to the NFC-L eList.

I welcome any feedback, and good night listening!

Sincerely,
Chris T-H








--
Christopher T. Tessaglia-Hymes
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



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ETNA_NY_20160925_031837_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_031837_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_034057_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_034057_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_034437_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_034437_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_044717_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_044717_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_051847_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_051847_Possible Bicknell's Thrush.wav

[nfc-l] Possible Bicknell's Thrushes

2016-09-25 Thread Christopher T. Tessaglia-Hymes 
On Saturday night, there was a cleanup flight following Friday’s awesome night 
migration. Among the scattering of calls throughout the night, I recorded a 
total of 10 possible Bicknell’s Thrush night flight calls. Each of the calls 
peaked above 4.0 kHz with the highest two calls peaking around 4.8 kHz. While 
none are “clear” Bicknell’s Thrush calls (peaking above 5 kHz), the structure 
of the calls (sharp onset followed by a variably modulated and notably longer 
trailing descent) are very reminiscent of Bicknell’s Thrush call examples which 
are noted in the Evans and O'Brien Flight Calls of Migratory Birds CD-ROM.

Overnight Saturday to Sunday morning, there was a notably Eastern component to 
the winds over Etna, NY. This could potentially account for an Eastward shift 
of birds departing from their mountaintop breeding grounds in the Adirondacks.

While I realize these could arguably be particularly high frequency calls from 
Gray-cheeked Thrushes, it would likewise seem reasonable that these could be 
lower frequency Bicknell’s Thrushes. So much is yet to be learned about sexual- 
and age-related differences in calling frequencies of these two species.

Attached are the first five calls, with the remaining five appearing in a 
separate message to the NFC-L eList.

I welcome any feedback, and good night listening!

Sincerely,
Chris T-H








--
Christopher T. Tessaglia-Hymes
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


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Please submit your observations to eBird:
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ETNA_NY_20160924_235708_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160924_235708_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_28_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_28_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_001158_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_001158_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_002708_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_002708_Possible Bicknell's Thrush.wav


ETNA_NY_20160925_004058_Possible Bicknell's Thrush.wav
Description: ETNA_NY_20160925_004058_Possible Bicknell's Thrush.wav

[nfc-l] Interesting Savannah Sparrow Call

2016-09-25 Thread Preston Lust 

9/24-25/16, 8:00 PM-6:30 AM -- Yard, Westport CT

While looking through the results of last night's extremely productive 
recording, I stumbled upon a very interesting savannah sparrow call which is 
superficially similar to an Ipswich call, mainly because it is highly 
modulated. As Ipswich savannah sparrows are very rare in Connecticut, I was 
wondering if anyone could confirm or refute this tentative ID. Attached is a 
screenshot of the spectrogram, and (a very brief) clip of the call.

Preston Lust, Westport CT
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