[NatureNS] Looking for help with a song ID

From: Stephen Shaw <srshaw@Dal.Ca>
To: "naturens@chebucto.ns.ca" <naturens@chebucto.ns.ca>
Thread-Topic: [NatureNS] Looking for help with a song ID
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Date: Tue, 16 Jun 2015 16:10:18 +0000
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If experienced birders armed with sound analysis software (that birds don't have) sometimes can't easily distinguish between calls made by related species, are the birds themselves in the same fix?  Do species with similar songs occasionally get attracted acoustically to the wrong species partner or rival, when there's no immediate visual contact to help?  Are their sound filters just better than ours, or are they helped mostly by occupying different geographic niches?  Or is the learned component in bird songs important for this? 
If two sympatric daughter species evolved from their common ancestor, there must have been strong selection pressure for the songs to diverge significantly to become operationally distinct in order to maintain breeding isolation. 
Is anything known about what constitutes a 'just noticeable difference' in a song for this? -- someone must have looked at this.
Steve     
________________________________________
From: naturens-owner@chebucto.ns.ca [naturens-owner@chebucto.ns.ca] on behalf of Jeff MacLeod [jeffnaturens@gmail.com]
Sent: Tuesday, June 16, 2015 7:51 AM
To: naturens
Subject: Re: [NatureNS] Looking for help with a song ID

Thanks for the replies. I feel pretty silly for not realizing that is a yellow-rump! I knew it was familiar, but get stuck looking for a distinct two-part trill from a yellow-rump. Oh well. Rick, glad you also think the first is a Redstart.

Jeff


On Tue, Jun 16, 2015 at 7:38 AM, nancy dowd <nancypdowd@gmail.com<mailto:nancypdowd@gmail.com>> wrote:
Oops. I did not see Rick's comment before I posted. At least we agreed.

Nancy
On 2015-06-16, at 7:31 AM, nancy dowd <nancypdowd@gmail.com<mailto:nancypdowd@gmail.com>> wrote:

> Not sure but your second recording XC252875 sounds like a Yellow-rumped Warbler- a bouncy slightly rising and falling trill.
>
> Nancy
> On 2015-06-15, at 10:25 PM, Jeff MacLeod <jeffnaturens@gmail.com<mailto:jeffnaturens@gmail.com>> wrote:
>
>> Another that I'm having some difficulty with:
>> http://www.xeno-canto.org/252875
>>
>>
>>
>> On Mon, Jun 15, 2015 at 9:04 PM, Jeff MacLeod <jeffnaturens@gmail.com<mailto:jeffnaturens@gmail.com>> wrote:
>> http://www.xeno-canto.org/252866
>>
>> From Meaghers Grant this morning. I heard some Redstarts around there that sounded like this and left out the end note.
>>
>> Thoughts about the ID?
>>
>> --
>> Jeff MacLeod
>> Halifax
>>
>>
>>
>> --
>> Jeff MacLeod
>> Halifax
>




--
Jeff MacLeod
Halifax

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