American Redstart, Black-White Warbler or other in Southeastern Penn

["Andrew Albright" albrigh]

Recorded this morning (6 am) in Andorra Natural Area, Philadelphia.

I thought for sure that it was a Black-And-White Warbler this morning when I 
heard it.  But then I'm completely stumped when I compare the sonogram to known 
American Redstart and Black-And-White Warbler.

WMA* file here: http://www.box.net/shared/ncypskfb8q

Number of repeats - more like A. Redstart
Pitch - more like Warbler
Quality - more like BW Warbler

It was at the top of a tree.  There are plenty of Redstarts breeding in the 
area, but I haven't seen any BW Warblers since migration.

Sincerely,
Andrew Albright
Lafayette Hill, PA


*WMA seems to work for most people, I also have it as a larger mp3 file.










"While a picture is worth a thousand words, a 
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause


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