BIRDS OF NEW YORK 



33 



c= common; f c = f airly common; unc = uncommon 



It is evident that the western New York lowland both from its tempera- 

 ture and its fauna is AUeghanian with a slight admixture of Carolinian 

 forms. The Bobwhite, Grasshopper sparrow, Rough-winged swallow, 

 Golden -winged warbler, Prairie warbler, Louisiana water-thrush, and 

 Hooded warbler are not strictly Carolinian species, but all have their north- 

 ern breeding limit in the AUeghanian (Transition zone), although they 

 are more common in the Carolinian (Upper Austral) zone. In the case of 

 Mammalia western New York is even more strongly AUeghanian. 



On account of the great diversity of soils, slopes and drainage systems 

 in New York, and the greater or less isolation of its cold and warm areas, 



