470 Birds of Colorado 



duller, especially the forehead, which is pale yellow instead of a bright, 

 almost orange-yellow. 



Distribution. — Breeding chiefly in Canada from Hudson Bay to 

 Newfoundland, and wintering in Central America from Guatemala to 

 Costa Rica. 



The discrimination of the eastern and western forms of this Warbler 

 in the Colorado records is a httle uncertain, but there can be little 

 doubt that the eastern form occasionally occurs as a straggler on 

 migration in Colorado. There are no undoubted Colorado examples 

 of this form in the Aiken collection, but Ridgway mentions a specimen 

 from Fort Garland, taken in May, doubtless by Henshaw, and now 

 in the United States National Museiun. Most of the other records 

 seem to refer to the Pileolated Warblers. 



Canadian Warbler. Wilsonia canadensis. 



A.O.XJ. Checklist no 686— Colorado Records— Aiken 00, p. 298 ; 

 Cooke 97, p. 220 ; Chapman 07, p. 280. 



Description. — Male — Above slaty-grey, the crown slightly spotted 

 with black, the forehead, lores and a patch under the eye usually 

 black ; a line from the bill to above the eye and the imder-parts yellow ; 

 a series of black spots across the breast ; under tail-coverts nearly 

 white ; iris brown, bill dusky-brown, paler on the lower mandible; 

 legs pale horn. Length 4-75 ; wing 2-45 ; tail 2-15 ; culmen -4 ; tarsus -75. 



The female is very similar, but duller throughout, and the black 

 of the crown, forehead and lores is less dLstinct, and the breast spots 

 dusky and not well defined. There is very little seasonal change, 

 and the yomig bird is like the female, with still less sign of black. 



Distribution. — Breeding from Athabasca and Newfoundland south 

 to Minnesota and Connecticut, and further south along the Alleghany 

 Mountains, wintering chiefly in Ecuador and Peru. 



In Colorado the Canadian Warbler is a straggler on migration. It 

 has been taken once only — by Aiken near Limon in Lincoln co.. May 

 23rd, 1899. The single specimen, a male, is now in the Colorado 

 College Museum. 



Genus SETOPHAGA. 



Closely allied to Wilsonia in structure, but the bill rather flatter 

 and wider, and the rictal bristles generally more developed ; plumage 

 of the males with red or salmon on the wings and tail. 



Two species in the United States. 



American Redstart. Setophaga ruticilla. 

 A.O.U. Checklist no 687— Colorado Records— Allen 72, p. 148 ; 

 Aiken 72, p, 197 ; Trippe 74, p. 232 ; Minot 80, p. 228 ; Allen & Brewster 



