20 BIEDS OF EAST PEN-NSYLVANIA. 



Yellow-throated Fly- Vireo flavifrons. Not uncommon 

 catcher. from the end of April to September. 



(S.) 



Great Carolina Wren. Thryothoms Ludovidanus. Rather 

 rare. It appears early in May on 

 the borders of the Delaware. Mr 

 * John Cassin informs me that he has 



occasionally seen this bird on the 

 Wissahickon in Winter. (S.) 



Bewick's Wren. . . . Thryothoms Bewickii. Rare. It arrives 

 early in May. (S.) 



Long-billed Marsh Wren. Tkryothorus imlustris. Common along 

 the Delaware and other streams 

 from the beginning of April to the 

 middle of October. (S.) 



Short-hilled Marsh Wren. r/iryo</io?-i(^ stellaris. Rather rare 

 from AprU to September. (S.) 



House Wren Troglodytes nedon. Abundant from the 



end of April to October. (S.) 



Wood Wren Troglodytes A merkanus. Rare. This 



bird vei-y closely resembles the pre- 

 ceding species, Troglodytes aedon, in 

 Autumn plumage; indeed, it is 

 doubtful if the two are distinct. (S.) 



Winter Wren. . . . Troglodytes hyemaUs. Not uncom- 

 mon, arriving in October. Its nest 

 has been occasionally found in Pen- 

 nsylvania. This species is so very 

 like Troglodytes vulgaris of Europe 

 as to be at least only a variety. (W.) 



Tree Creeper. . . . Certhia famiUaris. Gkey Ckeepee. 

 Abundant, but more so in winter 

 than at other times of the year. I 

 can detect no difference between it 

 and that of Europe; it has the same 

 shrill but feeble note, and its habits 

 are identical. 



White-bellied Nuthatch. SHta CaroUnemis. Plentiful, and 

 resident. 



