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BAY-BREASTED WARBLER. 
660. Dendroica castanea. 5% inches. 
Male, with crown, throat and sides rich chestnut; 
female, paler; young and adults in winter, greenish 
above, streaked with black and with a trace of chest- 
nut on the flanks. 
These Warblers are only locally abundant during mi- 
erations, while in eastern New England they are rare. 
They are active insect hunters, darting rapidly about 
the ‘tree tops or, less often, in brush; their habits most 
nearly resemble those of the Chestnut-sided Warbler. 
Song.—A low, liquid warble. 
Nest.—At low elevations in trees in swampy woods; 
compact, cup-shaped structures made of fine shreds of 
bark, rootlets and grass; eggs bluish white, finely 
specked around the large end with reddish brown (70x 
4540))) 6 
Range.—Fastern N. A., breeding from the northern 
edge of the U. S. northward; winters south of the U. 8. 
