I fished out the binoculars, not with any real hope--it was in pretty good cover--and indeed, I never caught more than a flash of the body. The tail, however, was spread, bright yellow, and had a sharp black T-shape on it. Being very bad with warblers, I went to the book, where I discovered (as most veteran birders are probably already aware from that description) that it was a female American redstart.
It's not a lifer, but it's a much better sighting than my last, which I barely recall (I have it noted on the list, but memory is fickle--must've been on my trip to Tennessee during the migration. Obviously not a very dramatic sighting.)
And now, finally to work on Wurstbreath...I want this sucker done by the end of the month.