Monotypic. Length 5.5". The bright yellow spectacles, throat, and breast of this vireo are distinctive. Its wings are dark gray, with 2 bold, white wing bars. The crown and back are olive ...

Polytypic (6 ssp.). Length 5.3". Spring male: crown and back blue-gray streaked with black. Yellow crown patch, distinct rump patch, and patches at sides of breast. White or yellow throat.

Wings more boldly patterned. Yellow lesser coverts. Wide, whitish lower wing bar. Bill darker than in breeding season. Winter female: mostly drab gray body with black wings and 2 bold buffy wing bars.

Woolly monkeys were once considered four species: the gray, Columbian, silvery, and Peruvian yellow-tailed woolly monkeys. More recent genetic studies suggest there are only two species—the ...

Underparts variable; some have brighter yellow belly and flanks, while others are quite gray. Nonbreeding adult male: simi­lar to breeding male, but loses red head. Duller red confined in varying ...

Adult: small; yellow eyes; bill yellow-green at the base ... Occurs in rufous and gray morphs as well as intermediate brownish plum­ages; plumages are alike, but the female is larger.

The bill is generally bulky and long and ranges from gray to pale horn in color ... Breeding female: generally mustard yellow-orange, with greener wings and upperparts. Some may have dull red ...

Adult male: gray on the head, and breast tinged pinkish; narrow white half-collar across the upper hind neck, with iridescent greenish below. Iris pale yellow; narrow orbital skin purplish ...

Songs and calls among the subspecies are generally simi­lar, but songs and calls of the “gray-headed” dorsalis are more suggestive of the yellow-eyed junco. Call: sharp dit. Flight note ...

Female: orange to orange-yellow on head and breast, showing a ghost pattern of male face pattern, with darker eye line and brighter yellowish supercilium. Back gray, below pale whitish gray with ...

Mono­t­ypic. Length 7.8–9.2". Adult: black head blends to slate gray back; central crown patch varies from red to yellow. Dark gray wings; narrow white edgings to upperwing coverts and ...