Good shot of the landing bird, but I'm puzzled at the blank sky covering 90% of the picture. It's good for a negative space challenge, but I'd like to see the picture either cropped to the lower/left quadrant or, better yet, panned down and left to catch more of the tree.
Really nice capture here, beautiful bird. I would have liked a little tighter crop here. I find the blue sky just too dominant; it is a nice color though :).
A good use of negative space. Highlights on the bird are a little blown out, but you don't have time to make fine adjustments to the camera when a shot like this comes along.
Try putting the subject in a different spot in the picture. It looks like the bird is flying out of the frame. The stuff at the bottom probably helps add to the picture more than the blue sky does anyway. Try framing the bird at the top right.