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Cerulean Warbler
Adult male--Upper parts pure blue, streaked with black on the back and sides of head; under parts white, streaked with blackish on the sides, and on the breast, across which the streaks form an irregular band.
Adult female--Upper parts greenish; under parts white, tinged more or less with yellow. Length--4.50.
"Breeds in the Mississippi Valley as far north as Minnesota, and eastward as far as Lockport, New York"; rare east of the Alleghanies.
The nest is made of grasses, spider web, and lichen, lined with fine grass; it is a compact structure placed at a considerable height from the ground, probably not less than twenty, and from that up to fifty feet. The eggs are white, tinged with cream, blue, or green, and spotted and blotched (sometimes chiefly at the larger end) with brownish red and lilac gray. The full complement is probably 4. Size--.65 x .50.
The nests of this beautiful blue warbler are rather rare, not only from the fact that the birds themselves are common in but few places, but because the nests, being placed on high branches in the forests, are exceedingly difficult to find. The breeding season probably begins about the middle of May, or perhaps rather earlier.