Good subject and nice BG. Unfortunately the bad HA and tight framing at bottom (clipped toes are a no-no) and left hurt the image. Looks like a tame individual - perhaps it'll give you another chance!
Cool bird, my first look at one.
The image is just too tight. That's a problem that is very easy to fix in the future, zoom out.
And of course you mentioned the head angle - however you sure get a good look at the crossed bill.
The subject is interesting, sharp and well exposed.
I really like the background and perch.
Bottom line, re-creating this image would be more than worthwhile.