446 Birds of Colorado 



Baca CO. (Warren), Fort Garland and Pagosa Springs (Aiken), Wet 

 Mountains to 8,000 feet (Lowe 94), and finally Mosca Pass, 10,000- 

 11,000 feet, Huerfano co. (Aiken). 



Habits. — ^Very little has been written on the habits 

 of the Orange-crown either in Colorado or elsewhere ; 

 Henshaw states that it frequents the tops of low trees 

 and bushes, whence it makes Flycatcher-like darts at 

 passing insects, and that it has a short and simple song. 



Its nest has not been described, but that of its close 

 ally, the Lutescent Warbler, is placed on the ground, 

 generally on dry hill-sides covered with brush, and is 

 loosely made of dry leaves and grasses, Imed with, fine 

 grass. The eggs closely resemble those of the Lutescent 

 Warbler, being white or creamy-white, finely speckled, 

 chiefly at the larger end, with reddish or chestnut-brown. 

 They measure "64 x *46. 



Tennessee Warbler. Vennivora jteregrina. 



A.O.U. Checklist no 647 — Colorado Records — Ridgway 73, pp. 176, 

 180 ; Minot 80, p. 226 ; Drew 85, p. 15 ; Cooke 97, pp. 113, 168, 218, 

 224 ; 04, p. 42 ; Henderson 03, p. 237 ; 09, p. 239 ; Chapman 07, p. 83 ; 

 H. G. Smith 05, p. 82 ; 08, p. 190. 



Description. — Male — Head and neck ashy-brown, rest of the iipper- 

 surface olive-green, brightest on the rump ; wings and tail dusky, 

 the primaries edged with greyish, the secondaries, coverts and tail- 

 feathers with olive -greenish ; the tail white on the iimer web ; super- 

 ciliary streak white, bordered below by a dusky line running through 

 the eye ; below dull white, shaded with grey on the flanks ; iris brown, 

 bill blackLsh-brown, paler on the lower mandible ; legs homy-brown. 

 Length 4-20 ; wing 2-5 ; tail 1-75 ; culmen -43 ; tarsus -65. 



The female closely resembles the male, but sometimes the ashy-grey 

 of the head is slightly tinged with olive. Young birds have the head 

 and neck green like the back, and the superciliary streak and under- 

 parts, except the under tail-coverts, strongly washed with yellowish- 

 olive. 



Distribution. — Breeding from Alaska and Labrador to British 

 Columbia and New England ; south in the fall through the Middle 

 States and Mexico to Central America, Colombia and Venezuela in 

 winter. 



