PLATE XLVII.—BLACK-THROATED BILUE WARBLER. 
Dendroica ccrulescens. 
Above gray-blue; sides of head, throat and sides of body black : 
breast and belly white ; wings dark, with a white patch, and some of 
the feathers edged with blue ; tail dark, nearly even, some of its feathers 
bordered on the outer edge with blue, and patched on some of the 
inner webs with white ; bill black; feet brown. Length, 5.25 inches. 
Migratory. Arrives early in May, leaves early in October. Nests in bushes. Most 
abundant during the migrations. 
The following extracts from Mr. Burroughs admirably characterize the song and 
habits of this Warbler : 
Song : “‘ twea-twea-tweaee in the upward slide, and with the peculiar 7-ing of Summer 
insects, but not destitute of a certain plaintive cadence. It is one of the most languid, 
unhurried sounds in all the woods. I feel like reclining upon the dry leaves at once. 
Audubon says he has never heard his love-song ; but this is all the love-song he has.”’ 
Habits : **He has a preference for dense woods of beech and maple, moves slowly 
amid the lower branches and smaller growths, keeping from eight to ten feet from the 
ground, and repeating now and then his listless, indolent strain.” 
167 
