Cassin's Kingbird
Tyrannus vociferans

f5.6 @ 1/2000s, ISO:800, Nikon D3S w 500mm

"Cassin's Kingbird," Wikipedia, the free encyclopedia. Cassin's kingbird is a large tyrant flycatcher native to western North America. The name of this bird commemorates the American ornithologist John Cassin. Adults have a gray head with slightly darker cheeks; a dark unforked tail with a buffy fringe and gray-olive underparts. They have a pale throat and deep yellow lower breast.
Ash Canyon, Sierra Vista, Arizona