Audubon's Warbler

Setophaga coronata auduboni

Audubon's warbler (Setophaga auduboni) is a small bird of the Parulidae family.
Audubon's warbler Sep 18, 2014. 
The summer male Audubon's warbler has a slate blue back, and yellow crown, rump and flank patch. It has white tail patches, and the breast is streaked black. The female has a similar pattern, but the back is brown, as are the breast streaks. (I think the one in the spotting could be a female.) This form is distinguished from the myrtle warbler by its lack of a whitish eyestripe, its yellow throat, and concolourous cheek patch.
Habitat:
Trees next to Tenaya Lake, Yosemite NP, CA. Audubons warbler,Geotagged,Setophaga coronata auduboni,Summer,United States

Naming

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. The two forms probably diverged when the eastern and western populations were separated in the last ice age.

References:

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Taxonomy
KingdomAnimalia
DivisionChordata
ClassAves
OrderPasseriformes
FamilyParulidae
GenusSetophaga
SpeciesS. coronata auduboni