Chipping Sparrow
Spizella passerina

f4.5 @ 1/4000s, ISO:800, Nikon D3S w 500mm

"Chipping Sparrow," Wikipedia, the free encyclopedia. Chipping sparrows vary across their extensive North American range. There is minor geographic variation in appearance, and there is significant geographic variation in behavior. Ornithologists often divide the chipping sparrow into two major groups: the eastern chipping sparrow and the western chipping sparrow. However, there is additional plumage and behavioral variation within the western group.
Ash Canyon, Sierra Vista, Arizona