a very nice photo, i love composition and colors, my only comment would be that the sparrow seems to be slightly out of focus as it appears the focused part of the image is the edge of the leaves. Keep up the good work though! :)
Wow! I'm impressed that you were able to get such a "candid" shot of the bird. The composition and execution of the photo is wonderful. I agree with Michael that the bird is somewhat out of focus though. If you would be able to get a sharp image of the bird it would add some dimension to the photo. However, I know that with some cameras (mine included!) it is hard to get the focus and the aperture set correctly because you may not have a whole lot of control over it. Keep up the good work!
Yes, the sharpness could be a little better - only it's hard to do because this photo was made with quite a big zoom from a long distance. And those rascals tend do move a lot ;)