Townsend’s Warbler 459 
Black-throated Green Warbler. Dendroica virens. 
A.O.U. Checklist no 667. 
Description.—Male in spring—Above yellowish olive-green, a little 
streaked with black on the back ; sides of the head and neck, including 
the malar region and a superciliary stripe, lemon-yellow, turning to 
olive-green on the postocular region and ear-coverts; chin, throat 
and chest black; rest of the under-parts white or yellowish-white, 
streaked with black on the flanks ; wings and tail dusky, the former 
with a white double bar, the latter with white on the inner webs of 
the outer rectrices; iris brown, bill blackish, legs and feet horny. 
Length 4-5; wing 2-5; tail 1-9; culmen -4; tarsus -7. 
The female has the chin and throat whitish or pale yellow, but is 
otherwise much like the male. 
Distribution.—Breeding from Nova Scotia and the southern shores 
of Hudson Bay, south along the mountains as far as South Carolina. 
In the winter south to the West Indies, and eastern Mexico as far 
south as Panama. 
Mr. L. J. Hersey obtained a single example of the Black-throated 
Green Warbler at Barr, near Denver, May 20th, 1909. The specimen 
is now in the Natural History Museum at Denver. This is the only 
record of the species in the State. 
Townsend’s Warbler. Dendroica townsendt. 
A.O.U. Checklist no 668—Colorado Records—Henshaw 75, p. 200; 
Drew 85, p. 16 ; Morrison 88, p. 72 ; Lowe 94, p. 269 ; Cooke 97, p. 116 ; 
04, p. 90 ; Chapman 07, p. 154 ; Cary 09, p. 183. 
Description.—_Male in spring—Crown and throat black; another 
black patch on the side of the head from the base of the bill to the 
ear-coverts, separated above and below by a yellow streak, and con- 
taining a yellow spot below the eye ; back yellowish-green spotted with 
black, wings and tail dusky black, the coverts tipped with white, 
forming a double wing-band; the three outer pairs of tail-feathers 
largely white on the inner web; central part of the breast yellow, 
posterior part and under tail-coverts white, with well marked black 
streaks on either side ; iris brown, bill blackish, legs dark horn. Length 
4-75; wing 2-70; tail 2-0; culmen -40; tarsus -65. 
The female is not very unlike the male, but the crown is olive-green 
spotted with black, and there is little black spotting on the back ; 
there is less white on the tail; and the chin and throat are yellow 
throughout, showing black bases to the feathers. The male in autumn 
has the black of the crown and throat obscured by olive-green tips 
to the feathers, and the young bird is very similar. 
