That bird sure looks puffed up! Eye contact is good and I like the classic wren raised tail feathers. I find the surroundings to be a little too busy, in particular the bright diagonal line on the right side of the frame. I would probably sharpen the bird a little more.
Good input from Doug. The environmental clutter makes this one a challenge, to keep the attention focused on the bird. Particularly the bright diagonal bar as pointed out by Doug. I would try to tone that down a bit, or crop much tighter to eliminate as much of it as possible.
I would rather have the image a little tight in the frame than have the bar in there.
He is an attractive little guy, with a good catch light and nice colors.