[NatureNS] Looking for help with a song ID

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Date: Tue, 16 Jun 2015 19:57:17 -0300
From: Rick Whitman <dendroica.caerulescens@gmail.com>
To: naturens@chebucto.ns.ca
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And sometimes things get a bit off track:

http://rickwhitman.smugmug.com/Nature/Birds-April-June-2015/i-HvfRNKL/A

(The diagnostic photo follows this mp4 file. The sirens are irrelevant.)

Rick Whitman

On 6/16/15, nancy dowd <nancypdowd@gmail.com> wrote:
> Hi Steve
>
> I'm not an expert on anything but there was, and likely still is, a lot of
> really interesting work being done on bird song development and recognition.
> It is generally thought that birds are born with a genetic template of their
> song that is shared by all members of that species. This template is usually
> (but not always) modified through learning leading to individual and
> geographic song variations. But the shared template coded into each
> individual of that species remains and likely is the reason the birds can
> filter out other species' songs despite intra- and interspecific variations.
> They can pick out the basic genetically coded "song" amidst all of the
> noise. It seems technology would need to be able to tease out the
> genetically encoded song template of each species to reliably separate them.
> If or how this could ever be done is beyond me.
>
> I am mainly dragging this up from memory of papers read during some
> song-type recording work about 20yrs ago. This site covers the same subject
> https://web.stanford.edu/group/stanfordbirds/text/essays/Vocal_Development.html
> and further searching should turn up some other more (recent) works on this
> topic.
>
> Nancy
>
>
> On 2015-06-16, at 1:10 PM, Stephen Shaw <srshaw@Dal.Ca> wrote:
>
>> 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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