JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 



129 



(6) Tarsus, bare; wing, less than 5.50 inches long. 



Subfamily PERDICIN^. Quail. Partridges. 



See page 136. 



Feet, small and weak; front toes, sometimes webbed at base; 

 primaries, ten; mouth, large; bill, very small in comparison with 

 size of bird; middle toe nail, with comb-like edge. 



Family CAPRIMULGID^E. 



Whip-poor-wills, Nighthawks, etc. 

 See page 168. 



Bill, small, flattened, and somewhat triangular in shape, the gape 

 very wide; wings, very long, usually extending beyond the tail. 



(Chimney Swifts, which belong to a 



f . T ! \\ very different family, are often mis- 



taken for Swallows when seen flying 

 about ; they are smoky black and the 

 shafts of the tail feathers extend in 

 spines beyond the webs. See next 

 Family. ) 



Swallow. 



Swallow. 



Swallow. 



Martin. 



Family HIRUNDINID^E. Swallows and Martins. 



See page 222. 



Plumage, smoky black; shafts of tail feathers, extending beyond 

 the web in sharp spines. Sometimes mistaken for Swallows by per- 

 sons unfamiliar with birds. 



