192 



BAY-BREASTED WARBLER 



Compton County, Quebec, Ottawa Naturalist, XVIII, 1904, 152. (5) A. R. 

 DuGMORE, The Increase of the Chestnut-sided Warbler, Bird-Lore, IV, 1902, 

 ^^. (6) Wm. Brewster, Birds of the Cambridge Region, 336. (7) F. H. 

 Herrick, Home Life of Wild Birds, Rev. Ed., 1905, 189, 222, 236 ,240. 



Bay-breasted Warbler 



DENDROICA CASTANEA (Wils.) Plat* XII 



Distinguishing Characters. — The adult c? in Spring may be known by its 

 chestnut crown, breast, and sides, black face, and buffy spot at the side of 

 the neck ; the adult $ in Spring by more or less chestnut in crown, on breast, 

 and sides, a grayish back streaked with black. Fall adults show more or less 

 chestnut on the sides but young of both sexes are singularly like the young of 

 Dendroica striata, which see. Length (skin), 5.00; wing, 2.90; tail, 2.10; bill, 

 .40. 



Adult 3, Spring. — Crown chestnut, forehead, lores, and cheeks black, a large 

 bufify space on the side of the neck sometimes spreading to the nape; back 

 grayish buff streaked with black; rump grayer; tail margined with gray, the 

 outer two to three feathers with white patches at the end of the inner web; 

 wings margined with olive-gray; the greater and median coverts broadly 

 tipped with white; throat, upper breast, and sides chestnut; rest of underparts 

 buffy white. 



Adult (^, Fall. — Upperparts olive-green more or less streaked with black, 

 the crown usually with some concealed chestnut ; tail and wings as in Spring 

 but coverts tinged with yellowish; underparts whitish the throat tinged with 

 yellowish, the breast, belly, and under tail-coverts with buffy; sides with more 

 or less chestnut. 



Young (S, Fall. — Similar to adult 3 in Fall but with no chestnut in crown, 

 upperparts less streaked, little or no chestnut on sides ; buff suffusion weaker. 



Adult ?, Spring. — Similar to adult <S in Spring but chestnut of crown mixed 

 with black; forehead and cheeks gray and black; chestnut on throat and sides 

 much fainter or appearing in patches only. 



Adult ?, Fa//.— Resembling adult 3 in Fall. 



Young 9, Fo//.— Resembling young c? in Fall, but without trace of chestnut. 



Nestling. — Above grayish olive, the head sometimes paler, nearly buffy, back 

 heavily spotted with wedge-shaped black marks; below whitish thickly spotted 

 with rounded black marks; median wing-coverts broadly tipped with white or 

 buffy white on both webs, the greater coverts, on only the outer web. 



General Distribution. — Eastern North America; north to Nev^^- 

 foundland and Hudson Bay; west to a Httle beyond the Mississippi 

 River. 



Summer Range. — Northern New England; New Hampshire 



(White Mountains, Lake Umbagog), Maine (Franklin, Penobscot, 



and Washington Counties), northern Ontario and, probably, northern 



Minnesota, north to Newfoundland, Hudson Bay and Saskatchewan. 



Winter Range. — Panama and Colombia. 



Spring Migration. — On the way to its summer home, the bird 



