Could be Wren. Since you are in Richmond, VA, my first guess would be Carolina Wren. But there are quite a few birds that make nests like that including House Sparrows.

This post was edited by FHFchrish on Tue, Mar 26, 13 at 19:34

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Possibly an Ovenbird as that is where their name comes from-the nest is supposed to resemble an old time oven. But Carolina wrens do the same & are much more common so FHFchrish is probably right. Hope an expert comes on & tells us or the original poster sees the bird & let's us know.
Susan

The location is wrong for an ovenbird, which are ground nesters.

Sorry, I didn't read the posts from the other forum. My bad!
Susan