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, 

 Btreaked 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 homy. 

 Length 4-5 ; wing 2-5 ; tail 1-9 ; culmen -4 ; tarsus •?. 



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. Dejidroica tovmsendi. 



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 tliroat obsciu-ed by olive-green tips 

 to the feathers, and the young bird is very similar. 



