AMERICAN WARBLERS. 443 



south in Sept., north in May. Frequents 

 evergreens, and sometimes other woodlands. 

 Song 1 , a series of double notes like jullup, 

 jullup, jullup, becoming a little squeaky as 

 they advance, and terminate in an ascend- 

 ing scale. 



Fig. 351 



Blackburnian Warbler. 



503. BLACK-THROATED GREEN 

 WARBLER. 



Larger, 5, cheeks and forehead, yellow: 

 green above, white beneath; throat and 

 streaks on sides, black; large tail spots and 



