Audubon's Warbler
Setophaga auduboni

f4.5 @ 1/8000s, ISO:1600, Nikon D3S w 500mm

"Audubon's Warbler," Wikipedia, the free encyclopedia. Audubon's warbler is a small bird of the family Parulidae. This passerine bird was long known to be closely related to its eastern counterpart, the myrtle warbler, and at various times the two forms have been classed as separate species or grouped as the yellow-rumped warbler, Setophaga coronata. This form is distinguished from the myrtle warbler by its lack of a whitish eyestripe, its yellow throat, and concolorous cheek patch.
Sierra Vista, Arizona