4 



The three great zones passing thru Pennsylvania 

 may he divided into several regions, differing radically in 

 the dominating species. In speaking of these regions, I 

 have followed the same plan set forth hy Witmer Stone and 

 shall follow in a general way his description of their 

 general characteristics. 



The Delaware Valley - The country lying along the 

 Delaware River from Bucks to Chester Counties and drained 

 hy the Schuylkill, Delaware, and Brandywine Rivers has a 

 bird fauna that is quite distinctive. Close to the river 

 from Philadelphia County southward are stretches of swampy 

 meadows interspersed with patches of woodland and large 

 solitary trees. Here the Swamp Sparrow is perhaps more 

 abundant than anywhere else within its range, while such 

 species as the Barn Owl, Yellow Warbler, Long Billed Marsh- 

 wren, and Pish Crow commonly breed. Farther back in the 

 drier farming land and the creek valleys often fringed with 

 laurel, we find the Turkey Vulture, Acadian Flycatcher, 

 Cardinal, Blue-winged and Worm-eating Warblers, Yellow- 

 breasted Chat, Carolian Wren, and Tufted Titmouse. 



The Susquehanna Valley - This valley stretches up 

 thru York and Lancaster Counties and carries many southern 

 birds northward which are rare in the surrounding country. 

 The birds are those typical to the Carolinian fauna but seem 

 even more abundant than in the Delaware Valley, the Louisiana 

 Water Thrush breeding here more commonly than in the Delaware 



