Cool shot Bill. I remember the other one you posted similar to this. Foliage frames the bird nicely. Great singing pose. It does have a touch too much look of a flashed shot to me but surely that is a personal preference kind of thing. Funny I see loads of these every year in migration but still do not have a proper shot of one.
The framing by the foliage makes the centered comp OK. I like the singing posture and overall colours. A bit of a flashed look as pointed out by Isaac, but it is not overwhelming.
I really like the natural framing and the singing pose. The flash looks okay to me, but some of the stems in the BG look a bit harsh on the edge, might be worth smoothing those lines a bit if possible. TFS, nice shot of a species I've only seen from afar to date