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 652. Dendroica aestiva aestiva ( Gmel . ) . Yellow Warbler. 



This beautiful, little, golden-hued Warbler is 

 locally an abundant bird, nesting thruout the state regard- 

 less of fauna but always occuring in the greatest numbers 

 along the river courses and along streams. This species is 

 especially abundant on the Tinicum Meadows in Delaware 

 County, and in a number of other localities it is one of 

 the numerous birds. 



654. Dendroica caerulescens caerulescens (Gmel.). Black- 

 throated Blue Warbler. 



The Black-throated Blue Warbler nests commonly 

 in a number of the counties of Pennsylvania lying within 

 the Canadian fauna and south in the Alleghanies to Cresson, 

 Cambria County. In many of the northern counties, this is 

 a very common bird, and I have noted it during the summer 

 months in Monroe, Pike, Wayne, Luzerne, Sullivan, Clinton, 

 Clarion, Venango, and Warren Counties, while in Wyoming, 

 Tioga, Potter, Elk, Lycoming, Clearfield, and McKean and 

 a number of other counties, it also breeds regularly. In 

 Center and Huntingdon Counties it ia quite rare. 



