What a morbid photo! I love it. I think the idea is great, the realization is a bit hard to do with such common colours in the whole thing. Technically, I think you should have possibly tried to get more over the subject. It's hard to comment on the technical part of things. I think if you had compensated a bit with the white balance, it would have been better.
I like the composition, I think it is impeccable. The image starts with the subject in the lower right corner, and it draws you up the subject to the back of the photo.
Did it fit the challenge? it's hard to say that you didn't meet the challenge with somethign which was obviously on the ground :)
Well done, and good luck in the future.
-Annida
Title - true, but not always pleasant to view. Amazingly complete skeleton. Contrasts between background and bones is not very strong. Focus seems sharpest on the head section. (didn't this carcas stink to high heaven?)
5 Swash