90 

 677. Oporornis formosus ( Wils . ) . Kentucky Warbler. 



In certain sections of Pennsylvania, the Kentucky 

 Warbler is one of themmost abundant of our woodland birds. 

 It is especially common in the southeastern and southwestern 

 counties, nesting in large numbers in Chester, Delaware, 

 Philadelphia, Montgomery, York, and southern Bucks Counties 

 as well as in Greene and Washington Counties as far north 

 as Clarion. It apparently does not breed much north of the 

 Carolinian fauna, tho its rarge overlaps such Alleghanian 

 species as the Rose-breasted Grosbeak and Bobolink. 



679. Oporornis Philadelphia ( Wils . ). Mourning Warbler. 



and 

 The Mourning Warbler is a regular bird A in some 



localities an abundant breeding bird along the higher 



Alleghanies lying within the Canadian fauna as far douth as 



Cambria County. In portions of Warreu, Clinton, Potter, 



Elk, Lycoming, and Sullivan Counties, it is a common bird, 



while recently I have observed several birds nesting in Pike 



and Monroe Counties, where they had not been recorded 



heretofore. 



