Composition is executed very well here as the roof lines lead my eye straight to the bird. Looks to be just a tad over sharpened. I like the framing you chose also. It really compliments the birds colors.
The sky is your biggest enemy in this shot as it lacks color. Cropping closer would have hurt the composition though. Not much you could do with basic editing - but for your own private use/print I would try to add some color to the sky.
Very nice detail of the feathers. I love the color of them. The green blue roof really enhances their color. The sky is uninteresting though and I would have probably tried cropping more of it out.
I hate vultures but this is really good. THe turquoise of the tin roof is a perfect contrast to his red head. The peak leads your eye up. I wish the sky were a tad more colored. Even gray would be nice. His feather detail is well done.