This fella flew in and seemed "riled up" immediately.....he certainly had a major attitude about him which made for some entertainment and interesting shots.
1D MKIII + Tripod/Wimberly II
500mm f4L
manual mode
1/1250
f/5.6
ISO 400
evaluative metering
ACR and CS5, added a sliver of canvas on the left edge.
You've got a very close HA here...it's almost away from us but there's still a nice amount of eye contact. That said, beautiful detail in the feathers and a really nice pose. This is one of those times where it's hard to pick a frame size/shape because the bird almost screams for a square crop. I think you did very well choosing what you did.