MD Osprey:

With all of the reports of Alder Flycatcher in the area, the 
following may be of interest.

It's rather detailed but appears to be quite thorough.

This was just posted on birdwg01 (Frontiers of Bird Identification). 
Much more than you probably (n)ever wanted to know, but hope it helps ...

Phil


>Date:         Fri, 6 Jun 2008 22:55:16 -0700
>From:         Arch McCallum <>
>Subject: [BIRDWG01] Traill's Flycatcher vocs
>To:           
>
>For those of you who like identification challenges, how about a 
>calling Traill's Flycatcher?
>That's a lot better than a silent one, right? But, there are still 
>pitfalls. I've been poring over the
>classic literature and recordings for a year or so, and have now 
>posted a new web page
>detailing the differences between the major vocalizations of Alder 
>and Willow Flycatchers. It's at
>
>http://www.appliedbioacoustics.com/Repertoires/Passeriformes/Tyrannidae/wiflalfl.html
>
>I hope you find it useful. Among other features, you can do 
>side-by-side visual (spectrographic)
>and aural  comparison of any two of the sounds.
>
>Conclusions: Stein's homologies look good for the most part. 
>Stereotypy is high,
>as one would expect of a Tyrannid. Based on the samples I've looked 
>at, from all
>over the breeding ranges of both species, I believe just about any 
>decently recorded Traill's
>sound can be identified to species, spectrographically, but some of 
>them sound pretty similar.
>
>If the new page is too complicated, a simpler one I posted a year 
>ago is still up. One
>thing it has that the new one doesn't is a longer sample of singing
>by each species.
>
>http://www.appliedbioacoustics.com/features/sounds/Traill/bird.old.html
>
>Feedback and corrections are welcome.
>
>Cheers,
>
>Arch McCallum
>Eugene, Oregon, USA

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Phil Davis      Davidsonville, Maryland     USA
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