LOVE the backlighting and the silhouetted view of the head as shown on the right wing. This shot could possibly be finessed a number of ways, chief among them darkening and enriching the bright sky, but also exploring the exact shadow/highlight relationship on the wings; this kind of lighting is tricky. The bright sky is not the greatest thing...this would be a good image for a shadow/highlight merge of two RAW conversions.
Cropping wise...it's tricky, but I envision a rectangle, pulled lower, and to the right. You need the bird to be "higher up" in some ways, so cropping off the bottom foliage hurts that feeling...and eliminating some of the sky above enhances the feeling of the bird dropping downward, hence my suggestion of a crop, a vertical, than is pulled downwardly, and to the right, putting a bit less space behind the bird, and leaving a bit more space in front of the bird.
This is the kind of shot that a guy can spend a lot of effort on, evaluating exactly the best way to handle the final "look". This one is worth several different tries.