412 
WOOD WARBLERS 
Distribution. — From southern Arizona to western Texas and south to 
northwestern Mexico ; in winter to Guatemala and Nicaragua. 
652b. D. a. rubiginosa (Pall.). Alaskan Yellow Warbler. 
Like cestiva, but slightly smaller and much duller ; adult male with 
upper parts darker, duller olive green, crown like back or only slightly 
yellower on forehead ; adult female duller olive green above, duller yellow 
below. Male: length (skins) 4.02-4.45, wing 2.40-2.48, tail 1.57-1.81, bill 
.39. Female: length (skins) 3.90-4.33, wing 2.24-2.44, tail 1.61-1.73, bill .39. 
Distribution. — Alaska, south to Vancouver, migrating southward. 
654. Dendroica cserulescens ( Gmel.). Black-throated Blue 
Warbler. 
Adult male in spring and summer. — Face, throat, sides, and flanks black, 
sides and flanks streaked with white ; rest of under parts white ; 
upper parts grayish blue ; wing with conspicuous white patch at 
base of primaries. Adult female in spring and summer: upper 
■g parts olive, usually with white spot at base of primaries ; tail 
V ^ feathers edged with bluish or greenish gray ; inner web of 
Fig. 521. outside feather sometimes with paler or whitish spot ; eyelids 
with whitish streaks, that of upper lid extending over ear coverts ; under 
parts pale olive yellowish, shaded with olive laterally. Adult male in fall 
and winter: like spring male, but white of flanks faintly tinged with brown¬ 
ish buff and bill brownish instead of black. Adult female in fall and winter : 
like summer female, but upper parts greener; under parts yellower. 
Young male in first fall and winter: like adult winter male, but white of 
under parts more or less tinged with yellowish, bluish gray of upper parts 
tinged with olive green; black feathers of throat edged with whitish. 
Young male, first plumage: wings and tail as in fall males; white spot at base 
of primaries fully developed; lores black; rest of upper parts dark olive 
brown ; throat and superciliary buffy ; breast and sides ashy; belly sul¬ 
phur yellow. Young female, first plumage: wings and tail like winter fe¬ 
male ; spot at base of primaries soiled white; rest of upper parts light olive 
brown; lores dull black ; under parts buffy, olive buff on breast and sides. 
Male: length (skins) 4.33-4.72, wing 2.44-2.64, tail 1.93-2.13, bill .33-.39. 
Female: length (skins) 4.33-4.76, wing 2.36-2.48, tail 1.87-2.01, bill .35—.37. 
Distribution. — Breeds in Transition and Canadian zones from Hudson 
Bay to the northeastern United States, south to Pennsylvania in the 
mountains; migrates casually to base of Rocky Mountains; winters in 
Guatemala, the West Indies, and northern South America; accidental in 
Colorado and on the Farallone Islands. 
Nest. — In bushes, compact and deep ; made of fine grass, spider’s web, 
lichen, and strips of fine bark. Eggs: usually 4, buffy whitish or greenish 
white, more or less heavily spotted with reddish brown. 
Food. — Insects. 
655. Dendroica coronata (Linn.). Yellow-rumped Warbler. 
Adult male in spring and summer. — Crown patch and rump bright yellow; 
rest of upper parts bluish gray, streaked with black; wings 
, with two white bars ; tail black with gray edgings ; outer pair 
of tail feathers with large spots of white ; throat white ; rest of 
under parts black, yellow, and white. Adult female in spring 
and summer: similar, but smaller and duller; upper parts 
tinged with brown; color patches restricted. Adult male in fall 
Fig. 522. and winter: upper parts grayish brown, streaked with black 
