KEY TO GOATSUCKERS, SWIFTS, ETC. 193 



FIG. 115. FIG. 118. FIG. 119. 



Bill of Chickadee. Bill of Hummingbird. Bill of Sparrow. 



FIG. 116. 

 Bill of Crossbill. 



FIG. 120. 

 Bill of Swallow. 



FIG. 117. 

 Bill of Grosbeak. 



FIG. 121. 

 Bill of Crow Blackbird. 



Key to Adult Male Goatsuckers, Swifts, and 

 Hummingbirds. 



1. Bill long, with little gape. Upper parts green ; 

 throat metallic red. 



p. 1. RUBY-THROATED HUMMINGBIRD. 

 1'. Bill short, with wide gape. 



2. Small ; needle-like spines on end of tail. Un- 

 marked, sooty brown. Diurnal. Nests in chim- 



ueys p. 23. CHIMNEY SWIFT. 



2'. Large ; no spines on end of tail. Mottled wood-brown. 



Crepuscular. Nests on the ground. 



3. White spot on wing ; tail deeply forked, with white 

 crescent. Seen hunting for insects high in air. Call, 



peent p. 188. NIGHTHAWK. 



3'. No white spot on wing ; tail rounded ; outer tail fea- 

 thers mostly white. Seen hunting nearer the ground. 

 Call, Whip-poor-will . . p. 185. WHIP-POOR-WILL. 



