Exposure, sharpness, and comp all look good. I like the orange tinge to some of the feathers. What was needed (and mentioned alot already) is a catclight or reflection in the eye. In post, if there is a bit of a paler reflection on the upper part of the eye (which seems there is), you can dodge it...this would be an alternative to no flash (although in this instance flash would have been a better option).