Group Six — Blue or Blue and Yellow Warblers
1 The Cerulean Warbler
Length: About 4½ inches; one of the smaller warblers.
Male: Upper parts bright blue; head and back streaked with black; light streak above eye; white throat, breast, and belly, with a bluish-black line that extends across the breast and down each side; wings with two broad white bars; inner webs of all except the middle tail-feathers with small white patches near tips.
Female: Bluish-olive above, under parts pale yellow; light streak over eye; wings with white bars; tail-feathers with white tips.
Song: Mr. Stone describes the song of the Cerulean warbler as “an almost continuous ‘zwee-zwee, zwee, wee-ee’ during the nesting season.”152
Habitat: “They are numerous in the maple woods on the hillsides overlooking the swamp, as well as in the swamp itself,” writes Mr. Stone.152
Range: Eastern North America. Breeds mainly from southeastern Nebraska, Minnesota, southern Michigan and Ontario, western New York, Pennsylvania, and West Virginia, south to Texas, Louisiana, and Alabama.