Amazing colors in this guy. I would almost think it oversaturated, but you were there, so you will have to be the judge. Nice head angle. I think the eye could stand a bit more contrast between the pupil and iris, just to make it pop a bit, and to increase the apparent sharpness.
From a composition standpoint, needs more room to the right, and could stand a small crop off left. Normally I would crop a fair amount off the left, but the colors in and details in the feathers are such, that I would hate to lose too much!
3D!!! it pops of the bg big time. i might work the highlighted feathers low on the body and take a small crop off the top too. love the iridescence in the bird. nice light to get that.
Excellent details and the exposure looks good. I'm not a big fan of box cropping. If you have more room in front and cut some from the top I wonder what you get?