[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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Description: Wave audio

RE: [nfc-l] Interesting Savannah Sparrow Call

2016-09-25 Thread John Kearney 
Hi Preston,

You indeed have an interesting call. My feeling is that it is a highly 
modulated Savannah Sparrow rather than “Ipswich” Savannah Sparrow. I believe an 
Ipswich Sparrow should be of a higher frequency overall. That being said, I 
think we need some more examples of Ipswich flight calls and come up with a 
range of measurements for analyzing spectrograms.

It is also unlikely, not impossible, but unlikely that you would have an 
Ipswich Sparrow in Connecticut this early. Juvenile Ipswich Sparrows start 
leaving Sable Island in late September and will usually spend time on the coast 
of Nova Scotia and Maine before heading further south. Adults don’t leave until 
October.

You might find this You Tube video interesting about recent radio telemetry 
studies on the timing of migration and movements of Ipswich Sparrows: 
https://www.youtube.com/watch?v=vxtQggEA6XA.

John

 

Carleton, NS

 

 

From: bounce-120823611-28417...@list.cornell.edu 
[mailto:bounce-120823611-28417...@list.cornell.edu] On Behalf Of Preston Lust
Sent: September-25-16 10:05
To: NFC-L 
Subject: [nfc-l] Interesting Savannah Sparrow Call

 

 

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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[nfc-l] Unknown Warbler

2016-09-25 Thread Jerald 
Hello,

Could someone please tell me what this call is? The spectrogram reminds me
of Palm Warbler, but it's a bit high for that I think.

Thanks,

Jerald
Delaware

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Warbler Sp. 2320 9-24-16.aif
Description: AIF audio

[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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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] 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

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








--
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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