Good-looking bird, I like the sharpness, perch and open beak. I would darken the pupil a bit and also wish for more eye contact. I might have stopped down a bit more for wider DOF.
As Axel suggested, stopping down to F8 or F11 would have provided more DOF and kept the whole subject in focus. Check out fstop and aperture setting from Alan Murphy images. They will provide you good information on settings.
Love the calling pose, the sweet eye, the feather detail, and that rosy belly. And the SH.
It looks as if this bird was well below your position...
BIRDS AS ART Blog: great info and lessons, lots of images with our legendary BAA educational Captions; we will not sell you junk. 30+ years of long lens experience/e-mail with gear questions.
BIRDS AS ART Online Store: we will not sell you junk. 35 years of long lens experience. Please e-mail with gear questions.
Check out the new SONY e-Guide and videos that I did with Patrick Sparkman here. Ten percent discount for BPN members,