340 WOOD WARBLERS. 



J3. Crown greenish, a small white spot at the base of the primaries 

 almost concealed by wing-coverts. 



654. Black-throated Blue Warbler ( 9 and im.). 

 b*. Crown grayish, bend of the wing yellow. 



640. Bachmak's Warbler 9 . 



A Field Key to the 



Adult Male Warblers of Eastern North America in 



Spring and Summer Plumage. 



I. Throat yellow, white, or whitish ; under parts withovt streaks or patches. 

 II. Throat black, brown, or slate-color. 



III. Throat yellow or orange, under parts with streaks. (In one species a 



blackish-brown band across the breast.) 



IV. Throat white or whitish, with streaks or spots on the under parts. (In 



two species a yellow patch on the sides of the breast.) 



I. Throat yelloTi^, -vrhite* or -whitish; under parts without 

 streaks or patches. 



1. Throat yellow. 



A. Length over 6-00, the largest of the Warblers ; haunts dense thick- 

 ets in second growth ; song, a peculiar mixture of whistles, chucks^ 

 and crow-calls, delivered from the undergrowth, from the trees 

 above, or on the wing, when the bird resembles a bunch of falling 

 leaves 683. Yellow-breasted Chat. 



B. Length under 6-00. 



a. Head and neck bright golden yellow like the breast; tail-feath- 

 ers white, except at the tip; haunts near the water, especially 

 low bushes and willows hanging over streams and ponds; call, a 

 sharp joc^^'/ range, from Virginia southward. 



687. Prothonotary Warbler. 



b. Forehead and cheeks black, a yellow line over the eye ; song, a 

 low whistled call of five to seven notes; haunts near the ground ; 

 rangGfcfrom lower Hudson Valley southward. 



677. Kentucky Warbler. 



c. Forehead and cheeks black, bordered by grayish ; no line over 

 the eye ; haunts undergrowth ; call, a frequently repeated chacTc ; 

 song, a loud, rapid / beseech you^ I beseech you^ I beseech yoit^ or 

 witch-e-tvee-o^ witch- e- wee- 0^ witch-e-wee-o ; movements restless; 

 abundant 681. Maryland Yellow-throat. 



681&. Florida Yellow-throat (Fla.). 



d. Head and back olive-green; wings with two white bars; outer 

 tail-feathers white ; haunts pine woods : song, a musical trill. 



671. Pine Warbler. 



e. Crown bluish ash, eye-ring white ; call-note sometimes like the 

 sound produced by striking two pebbles together. 



645. Nashville Warbler. 



