Lovely portrait, with the open beak making it that much better. I only wish the head was turned just a bit more our way, so that we could see the complete right eye.
At ISO800, I wouldn't expect to see this much noise in some locations. I'm looking at the iris and inside the mouth, specifically. It may be a bit too much sharpening? Not really sure.
Thanks for your comments everyone. I did give the image an extra pass of USM before posting. Looked pretty good on this end but it may be pushed a little past the noise threshold for some viewers. Not cropped much. The bird was only 30 feet away.