JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 645 



shreds of bark, etc. The eggs are from 4 to 6, white, finely speckled 

 with brown chiefly at the larger end, and measure about .63 x .52 

 inches. 



306. Vermivora rubricapilla (WiLS.). 

 NASHVILLE WARBLER. 



Helminthophila ruficapilla (Wils.), A. O. U. Check List, 1895, p. 

 271. 



Distr.: United States and British Provinces east of the Rocky 

 Mountains; breeds from about the latitude of Nebraska and Penn- 

 sylvania northward to northern Quebec and Athabaska. 



Adult male in summer: Crown and sides of head, ashy gray, with 

 a partially concealed chestnut patch on the crown; back and rump, 

 yellowish olive or light olive green, brightest on upper tail coverts; 

 under parts, including under tail coverts, yellow, shaded with olive 

 on the sides; wings and tail, fuscous brown, edged with olive green. 



Adult female in summer: Similar, but paler, the crown patch 

 smaller, and the middle of the belly more or less whitish. 



Immature birds usually lack the chestnut crown patch. 



Length, 4.65; wing, 2.45; tail, 1.90; bill, .36. 



A common migrant in Illinois and Wisconsin and a more or less 

 common summer resident in the latter state. The song somewhat 

 resembles that of the Yellow Warbler. 



Regarding its nesting in Wisconsin, Kumlien and Hollister say: 

 " The Nashville Warbler nests regularly in different parts of the state. 

 We have nesting records at different times in Walworth County, at 

 Lake Koshkonong, Dunn County, and northward. It is an espe- 

 cially common migrant along Rock River Valley. A favorite nesting 

 site seems to be in tamarack swamps, the nest being placed on sphag- 

 rum, or reindeer moss." (Birds of Wisconsin, 1903, p. in.) 



The nest is on the ground and is composed of fine rootlets, moss, 

 and grass. The eggs are 4 or 5, pure white, finely speckled with 

 brown chiefly at the larger end, and measure about .60 x .47 inches. 



307. Vermivora celata (SAY). 

 ORANGE-CROWNED WARBLER. 



Helminthophila celata (Say), A. O. U. Check List, 1895, p. 272. 

 Distr.: Greater portion of North America, breeding in the west- 

 ern portion from New Mexico and Utah northward to the Mackenzie 

 region and northern Alaska; rare east of the Alleghany Mountains 

 north of Virginia; winters in the south Atlantic and Gulf states 

 and Mexico. 



