AMERICAN WARBLERS. 



443 



south in Sept., north in May. Frequents 

 evergreens, and sometimes other woodlands. 

 Sonor, a series of double notes like jtilhtp, 

 jullup, jiillup, becomino: a little squeaky as 

 they advance, and terminate in an ascend- 

 ing scale. 



Vig. 851 



lilackburnian Warbler, 1-3. 



503. BLACK-THROATED GREEN 

 WARBLER. 



Larger, o, cheeks and forehead, yellow: 

 green above, white beneath; throat and 

 streaks on sides, black; large tail spots and 



