The bird itself looks pretty good although its feathers look kind of messy:D not your fault anyway :) The biggest issue of course is the branches running across the photo from top to bottom, corner to corner, sitting between the viewers and the bird. Exposure looks good but would suggest open up some shadow areas.
An interesting pose given by the bird, the concentrate look on the bird and good HA. I don't mind about the branch that the bird perched on, but the one in front block the body and part of the tail. It is hard when shooting bird up in the tree to get a clear view, sometimes we have to take what we got :)