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



169 



Family MICROPODID^. Swifts. 



Bill, small and weak; mouth, large; feet, small; tail feathers, 

 with sharp spines extending beyond the tips. 



General plumage, sooty brown, showing a faint greenish tinge on 

 the upper parts; throat, ashy white; tail feathers, with sharp spines, 

 or points formed by the shafts of the feathers, extending beyond the 

 welDS. The Swifts are widely separated generically from the Swallows ; 

 but persons unfamiliar with birds might look for them under the same 

 family. Chcetura pelagica. 



Chimney Swift. 

 See No. 201. 



Family TROCHILID^E. Hummingbirds. 



Smallest of Birds. Wing less than 1.75 inches long (carpus to tip). 



Throat, ruby red; back, golden green (male); no red on throat 

 (female and young male). Trochilus colubris. 



Ruby-throated Hummingbird. 

 See No. 202. 



