>
> A few more bits of info about your mystery song are desirable. How often was
> it given? How loud was it (say, compared to a chickadee)? Was the hawthorn
> very tall, and if so, was the bird high up in it, or just in the thickest part
> of the tree? These bits could help us refine our guesses.

It was given once about every 30 seconds for a total of about 6 times. Then
the bird flew away. It was probably located about 20-25 feet off the ground
near the top of the tree, or perhaps in the holly tree behind it. I didn't
see the bird at all. It was a little louder than a chickadee's song, I
think.

I'll mull over the suggestions that people have given and listen to my bird
song CDs again, and see what I come up with. Ideally the bird give an encore
performance!

Joe Barsugli (joeb at atmos.washington.edu)