186 THE BIRDS OF NEW JERSEY. 



Warbler, Slack-capped. See Wilson's Warbler. 



Warbler, Black-poll. Length, five and a half 

 inches; extent, eight and a half inches; bill, one third of 

 an inch, the upper half black and the lower yellow, with 

 bristles at the base; crown and hind head, black; cheeks, 

 white; back, olive gray, with black streaks; breast, white, 

 with black streaks on the sides, rump, ashy; tail, black, 

 with white spots on the outer feathers; wings, black, 

 edged with ash and crossed by two white bars; legs and 

 feet, reddish yellow. In the female the upper parts are 

 an olive green with black streaks; under parts, white with 

 a yellow tinge; sides of throat, neck and body, with black 

 streaks. Fall plumage of the male similar to the spring 

 female. 



The nest is large, considering the size of the bird, and 

 is built in evergreens, spruce preferred. It is made of 

 twigs, moss and lichens, lined with grass and fine roots. 



The eggs are either four or five in number, white, with 

 brown spots, and seven- tenths by one-half an inch in size. 



The birds breed from northern New England to Alaska 

 and spend the winter in the Bahamas and northern 

 South America. In New Jersey they are abundant in 

 migrations, occurring from May 10 to June 1 and again 

 from September 20 to October 15. 



Their song is very wiry, and still soft, sounding like 

 tree-tree-tree rapidly repeated. 



Their food consists of insects, generally taken on the 

 wing. 



Warbler, Black-throated Blue. Length, five and 

 one -fourth inches; extent, eight inches; bill, one-third of 

 an inch, black, with bristles at the base; throat and sides 

 of head, black, the black extending down the sides of 

 the body; back, grayish blue, spotted with black in some 

 specimens; breast and belly, white; tail, dusky black, 

 with white spots and edged with blue; wings, dusky 



