340 WOOD WARBLERS. 



b*. 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. BACHMAN'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 without 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 yellow, white, 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 peek ; range, from Virginia southward. 



637. 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 ; 

 range from 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 chack ; 

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

 witch-e-wee-o, witch-e-wee-o, witch-e-wee-o movements restless ; 

 abundant 681. MARYLAND YELLOW-THROAT. 



681J. 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. 



