That sky is really nice. The bird is not in the intersection of the 1/3rd plane. I would also like it if he was looking toward the camera. Or you could have b&w it to give it more of the creepy feeling the subject inspires.
Nice composition and blue sky. The tree is stark, gray and compliments the vulture who is looking out to the blue sky. Maybe he is scoping out his next meal? This is an interesting and good choice of subject. Hope this does well.