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, lined 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. Vermivora peregrina. 
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 upper- 
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 inner 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 blackish-brown, paler on the lower mandible; legs horny-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. 
