Great pose and expression on that bird, captures its nature very well.
I'd only crop from the bottom bit more, or add space on the left.
I like the perch and the BG combo very much too.
I like this shot because it so captures the personality of this bird. Finding one down low enough to get this excellent angle is a miracle in itself. Usually I see them high in trees. Personally, I like the leaves and think they add much to the image. They prevent my eye from wondering down that strong diagnal line and leaving the subject.