Length: About 5 inches.
Male: Crown and under parts bright yellow; a black line through the eye; back olive-green, yellower at the rump; wings bluish-gray, edged with olive and white; two broad yellowish-white wing-bars; tail bluish-gray, with white patches of different sizes on outer feathers.
Female: Similar to male, but with less yellow on head,—on forehead and not on crown.
Song: “The song is insignificant, a wheezy performance of notes resembling the syllables ‘swee-e-e-e-e, chee-chee-chee-chee,’ the first inhaled, the second exhaled.”[152]
Habitat: “The Blue-winged warbler frequents swampy thickets but is sometimes found among the scrubby second growth of the hillsides and the undergrowth of dense woods.”[152]
Range: Breeds in eastern North America from southeastern Minnesota, southern Michigan, western New York, Connecticut, and Massachusetts, southward to Missouri, Kentucky, Maryland, and Delaware; winters from southern Mexico to Colombia.