28 CEEULEAX AVAKBLER. 



Young of both sexes similar to the adult female, but males, are white 

 beneath and females dull green above, and light buffy yellow beneath. 



Adults in Autumn do not differ from the spring dress. 



Dimensions. Length, 4.80 ; stretch, 7.90: wing, 2.60; tail, 1.75: 

 bill, .35 ; tarsus, .60. 



Comparisons. Known from all our other warblers by the bluish or 

 greenish colors above, white beneath, small size, and white wing bands, 

 and spots on tail extending over all but central tail feathers. 



Nests and Eggs. Xests, saddled upon horizontal limbs in woodlands, 

 from fifteen" to sixty feet above the ground, composed of fine grasses, 

 mosses, hempen fibers of i)lants, bits of hornet's nests, and sometimes 

 covered with lichens, all bound on with cobwebs. Eggs, three or four in 

 number, creamy or greenish white, sprinkled with reddish brown and lilac, 

 which sometimes combine and form a ring around the larger end. Dimen- 

 sions, .45 by .48. 



General Habits. This beautiful little warbler ap- 

 pears to frequent deciduous forests, evidently preferring 

 heavy growths of woodlands, but the only time that I ever 

 saw a specimen living, was at Williamsport, Pennsylvania, 

 May twenty-second, 1876, in a low growth of trees along 

 the Alleghany mountains. It was moving actively about. 



Breeding Habits. This warbler places its nest high, 

 and saddles it upon the horizontal branch of a tree, much 

 after the fashion practiced by the Wood Pewee, and as it 

 often covers the outside with lichens, the nest quite closely 

 resembles that of the Flycatcher. 



Song. Authorities appear to differ as to the song. 

 Goss, in his Birds of Kansas, says the song is " rather a 

 feeble effort, but clear, soft, and musical, ending in a creaky 

 manner." Mr. Brewster, in Minot's Birds of New Eng- 

 land says, "The song is a guttural trill, much like that 

 of the Blue Yellow-backed Warbler, and. hence possess- 

 ing about an equal degree of musical ( .-^ ) merit." 



Migration and Breeding Range. The Cerulean 

 Warblers migrate southward to their winter quarters, 

 which extend from South-eastern Mexico, south to Peru 

 and Bohvia, in September. They come north late in May, 



