RE: [nfc-l] Bicknell's Thrush - More Classic Example

2016-09-26 Thread John Kearney 
Hi Chris,

I was hoping someone else would give you some feedback on your nice series of 
thrush calls. Not only have I been talking too much lately but this topic can 
be a special quagmire. 

I want to note that I have one monitoring station that is the first landfall 
directly southwest of the island of Newfoundland. Therefore, the flight calls 
of Gray-cheeked Thrush that I record there are very likely Catharus minimus 
minimus. They are consistently less humped and more descending than Catharus 
minimus aliciae. Their maximum frequency is 4 KHz or a little greater. I had 
another monitoring station that is the first landfall southwest of Cape Breton 
Island where Bicknell’s Thrush breed. These thrush calls have a maximum 
frequency over 5 kHz. I have attached a photo illustrating these three types of 
calls, including one from Louisiana provided by Bill Evans. Perhaps some of 
your calls are C.m.minimus. Given this race is believed to winter in South 
America, including Columbia, one cannot rule out the possibility of them flying 
over Etna, NY. 

It would be interesting to get a series of night flight calls from these two 
species in areas close to their breeding range.

Thanks,

John Kearney

Carleton, NS

 

From: bounce-120825839-28417...@list.cornell.edu 
[mailto:bounce-120825839-28417...@list.cornell.edu] On Behalf Of Christopher T. 
Tessaglia-Hymes
Sent: September-26-16 08:15
To: NFC-L 
Subject: [nfc-l] Bicknell's Thrush - More Classic Example

 

Albeit soft and slightly distant, this bird was recorded over Etna, NY on 23 
September 2016 at 23:25. 

 

I would consider this to be a classic example because its peak frequency is 
above the 5kHz “safety” demarkation line.

 

This bird peaks around 5.25 kHz and has an overall duration of about 250 
milliseconds. Similar to the “possible Bicknell’s Thrush” examples posted 
yesterday, the sharp onset followed by a variably modulated and notably longer 
trailing descent is the call structure which caught my eye while browsing 
through my data last night.

 

Attached are both the recorded call (with some lower cricket and noise bands 
gently filtered out) and a screen grab of the call for visual representation.

 

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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Re: [nfc-l] Interesting Savannah Sparrow Call

2016-09-26 Thread Andrew Horn 
Hi all,

In the recent tagging study, the first juvenile Ipswich was detected on the 
mainland on 17 September (Crysler et al. 2016, Movement Ecology DOI 
10.1186/s40462-016-0067-8), and you’d expect a lower frequency call from this 
bigger subspecies (its song is slightly lower, too), so this all makes sense.

Cheers,
Andy Horn
Halifax

On Sep 26, 2016, at 8:44 AM, John Kearney 
mailto:john.kear...@ns.sympatico.ca>> wrote:

Hi All,
As an update to my response to Preston’s post yesterday, Jerald sent me offline 
a copy of a blog entry by Paul Driver on Ipswich Sparrow flight calls 
(http://pjdeye.blogspot.ca/2009/12/ipswich-sparrow-flight-calls.html). 
Recordings of the flight calls of Ipswich Sparrows in NJ show that their 
frequency can be much lower than previously thought and that the feature most 
distinguishing them from the nominate race of Savannah Sparrow is the degree of 
modulation in the call. This sheds a new light on Preston’s call in Westport.
It is interesting to note that I posted what I thought might be an Ipswich 
Sparrow flight call to this forum on 18 September 2013. Attached is a photo of 
the spectrogram, and the wav file can be found in the archives for that date. 
The call was recorded at Canso, NS. The point on the mainland of North America 
closest to Sable Island. Based on Paul Driver’s blog post, this call would also 
be a good candidate for Ipswich Sparrow.
John

From: 
bounce-120823749-28417...@list.cornell.edu
 [mailto:bounce-120823749-28417...@list.cornell.edu] On Behalf Of John Kearney
Sent: September-25-16 12:21
To: 'Preston Lust' mailto:prestonl...@yahoo.com>>; 
'NFC-L' mailto:nf...@list.cornell.edu>>
Subject: RE: [nfc-l] Interesting Savannah Sparrow Call

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 mailto:nf...@list.cornell.edu>>
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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RE: [nfc-l] Unknown Warbler

2016-09-26 Thread John Kearney 
Hi Jerald,

This is a tough one. I agree it is too high for Palm Warbler. It could be a 
high Yellow-rumped Warbler. It might also be an odd Ovenbird.  I would lean 
toward Ovenbird but should probably go with warbler species?

John

 

From: bounce-120824283-28417...@list.cornell.edu 
[mailto:bounce-120824283-28417...@list.cornell.edu] On Behalf Of Jerald
Sent: September-25-16 18:06
To: nfc-l 
Subject: [nfc-l] Unknown Warbler

 

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


 

-- 

Jerald

 

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RE: [nfc-l] Interesting Savannah Sparrow Call

2016-09-26 Thread John Kearney 
Hi All,

As an update to my response to Preston’s post yesterday, Jerald sent me offline 
a copy of a blog entry by Paul Driver on Ipswich Sparrow flight calls 
(http://pjdeye.blogspot.ca/2009/12/ipswich-sparrow-flight-calls.html). 
Recordings of the flight calls of Ipswich Sparrows in NJ show that their 
frequency can be much lower than previously thought and that the feature most 
distinguishing them from the nominate race of Savannah Sparrow is the degree of 
modulation in the call. This sheds a new light on Preston’s call in Westport.

It is interesting to note that I posted what I thought might be an Ipswich 
Sparrow flight call to this forum on 18 September 2013. Attached is a photo of 
the spectrogram, and the wav file can be found in the archives for that date. 
The call was recorded at Canso, NS. The point on the mainland of North America 
closest to Sable Island. Based on Paul Driver’s blog post, this call would also 
be a good candidate for Ipswich Sparrow.

John

 

From: bounce-120823749-28417...@list.cornell.edu 
[mailto:bounce-120823749-28417...@list.cornell.edu] On Behalf Of John Kearney
Sent: September-25-16 12:21
To: 'Preston Lust' ; 'NFC-L' 
Subject: RE: [nfc-l] Interesting Savannah Sparrow Call

 

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 mailto:nf...@list.cornell.edu> >
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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IPSP.png
Description: Binary data

[nfc-l] Bicknell's Thrush - More Classic Example

2016-09-26 Thread Christopher T. Tessaglia-Hymes 
Albeit soft and slightly distant, this bird was recorded over Etna, NY on 23 
September 2016 at 23:25.

I would consider this to be a classic example because its peak frequency is 
above the 5kHz “safety” demarkation line.

This bird peaks around 5.25 kHz and has an overall duration of about 250 
milliseconds. Similar to the “possible Bicknell’s Thrush” examples posted 
yesterday, the sharp onset followed by a variably modulated and notably longer 
trailing descent is the call structure which caught my eye while browsing 
through my data last night.

Attached are both the recorded call (with some lower cricket and noise bands 
gently filtered out) and a screen grab of the call for visual representation.

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_20160923_232554_BICKNELL'S THRUSH-edited.wav
Description: ETNA_NY_20160923_232554_BICKNELL'S THRUSH-edited.wav