More to explore:
White-winged choughs (photo by callocephalon photography) | Tumblr
White-winged Chough : Morning flight
White-winged Chough, Corcorax melanorhamphos by David Jenkins
White-winged Chough by Enchylaena on Flickr.
A beautiful photo of the Cornish Chough in flight.
White Mandarin Duck
American White Pelican