AMEKICAX WAKBLERS. 



445 



syllable; another song, usually late in sum- 

 mer, is trees, trees, miir-mur-ing trees, there 

 are also other variations but all are given 

 with a buzzy intonation that always charac- 

 terizes the species. 



Fii?. 353 



Kirtlaud Warbler. 1-3. 



504. TOWNSEND WARBLER. 

 Differs from last in having top of head 

 and cheeks black, and in being distinctly 

 yellow below black breast patch. Breeds 

 in western N. A. ; winters in Central 

 America; south in Sept., north in May, 

 accidental in Pa. 



