28 HOW TO NAME THE BIRDS 



2S. WARBLING VIREO. 



Mouse-color White . 



5. Whitish superciliary line ; below, sides tinged with 

 shade of back. 



Nest, pensile, higher than "red-eye's," "from 20 to 60 ft," in 

 poplar, elm, or buttonwood tree ; eggs, about June ist, 4-5, white, 

 brown-spotted ; found especially in trees along roadway ; a wayside 

 warbler. 



29. PHILADELPHIA VIREO. 



Mouse-color White. 



Indistinguishable, at field-range, from warbling vireo ; 

 differs in having extra quill in wing, and somewhat distinct 

 song ; in Pa. and N. J. it is only a rare migrant. 



BLACK LIST. 



^ Nos. 30-55 : Showiiig black, but no yellow NOR RED. 

 t Nos. 30-39 : Above and below quite or nearly alike. 

 Nos. 30-34 : Entirely or (32, 34) nearly black through- 

 out. 

 No. 35 : Slate, with black crown and tail. 

 Nos. 36, 37 : Ashy gray above, white or whitish below. 

 Nos. 38, 39 : Prevalent blue. 



30. FISH CROW. 



Black. 



14-16. Like common crow, but smaller. 



Along coast, north to Conn., rarely beyond ; along larger rivers of 

 Pa. ; nesting like common crow (33S) ; pisciverous. 



