I'd love to see the original. This appears to have had the contrast increased too much in order to make the bird look as black as possible, losing detail in the process.
I like this a lot, it really sticks to the spirit of the chalenge. I just wish the back edges of the wings and tail were a little sharper, I don't thik the image would suffer from sharpening much! :)
I like the contrast between the black vulture, and white bakground, but the vulture is so black that most of the detail in the wings, and feathers is lost. If there was more detail in the vulture this would be a much better photo.
I'm glad to see you did not desaturate out the red on the face. The totally white background looks like it was cleaned up, like it's missing clouds or something. Nice crisp shot.