Cool capture, details and eye contact. It was probably a good idea not to use a TC for faster focus. I might lighten the shadow on the ground and if you have maybe it would also work as pano crop with the entire shadow included.
Super capture of a bird that is hard to photograph still no less flying! Thanks for the exif - 1/3200 WOW! If you have more shadow I would use it or if not clone it out. Bob
Tremendous capture of this very difficult bird to photograph in flight. My first thought after admiring this capture was that the shadow detracts from the main subject. I would do a quick mask to remove the shadow since you have no more shadow to try the pano.
Holy cow! That is super! I am sure it is not a big bird, which makes it so much more special a capture. Very, very well done! :) Removing the shadow is a good idea IMHO. :)