ase THE BLUE-WINGED WARBLER. 
No. 53. 
BLUE-WINGED WARBLER. 
A. O. U. No. 641. Helminthophila pinus (Linn. ). 
Synonym.—BLvuE-WINGED YELLOW WARBLER. 
Description.—Adult male: Forehead and fore-crown bright yellow with 
a tinge of orange (Indian yellow) ; sides of head and entire under parts, except 
crissum, rich lemon yellow; a black line through eye; wings and tail bluish ash 
over dusky; tips of middle and greater coverts white, the former with yellowish 
tinge; three outer pairs of tail-feathers blotched with white on inner webs; re- 
maining upper parts bright olive-green, clearest and with most yellow on rump; 
crissum white. Adult female: Similar but with yellow of head restricted to 
forehead; under parts paler yellow; bill blackish; feet dark brown. Length 
about 4.75 (120.6) ; wing 2.37 (60.2); tail 1.72 (43.7); bill .41 (10.4). 
& 
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Taken near Oberlin. Photo by the Author. 
THE BLUE-WINGED WARBLER’S DOMAIN. 
THE NEST SHOWN IN THE FOLLOWING ILLUSTRATION OCCUPIES A POSITION NEAR THE CENTER. 
Recognition Marks.—Smaller; yellow on forehead and below; bright olive- 
green above; black line through eye; white wing-bars and smaller size as dis- 
tinguished from the Prothonotary Warbler. 
Nest, on the ground, at edge of thicket or black-berry patch, of leaves, grape- 
