110 



KEY TO FAMILIES OF LAND BIRDS 



O-^, 2. Bill long-, cutting edges smooth Cuculidae : 



i Road-runners, Cuckoos, etc., p. 193. 



Fig. 140. 



2.' Bill short, cutting edge toothed. Trogonidse : 



Trogons, p. 197. 



ORDER PICI: WOODPECKERS. 



Toes 3 or 4, only 2 in front ; 

 bill chisel-like ; tail fea- 

 thers stiff and pointed. 



Picidae : 

 Woodpeckers, p. 200. 



Fig. 143. 



Fig. 144. 



Fig. 142. 



ORDER MACROCHIRES: GOATSUCKERS, 

 SWIFTS, AND HUMMINGBIRDS. 



""'"I^X 1. Bill long and slender, gape not deeply cleft. Trochilidae 

 ^ ^ Humminerbirds. n. 23' 



Fig. 145. 



Hummingbirds, p. 232. 



4^c r. Bill short, wide at base, gape deeply cleft. 



Fig. 146. 



2. Plumage moth-like, lax ; middle toe long, and 

 inner edge toothed . Caprimulgidae : 



Goatsuckers, p. 222. Fig. 147. 



2'. Plumage compact, middle toe normal, not 



toothed Micropodidae : 



Swifts, p. 229. 



Fig. 148. 



ORDER PASSERES: PERCHING BIRDS. 



Toes 4, 3 pointing forward, 1 back ; 

 never united for half their length. 



all on the same level and 



Fig. 149. 



1. Inner toe with basal phalanx united to that of middle toe. 



Cotingidae : Cotingas, p. 245. 



1'. Inner toe with basal phalanx not united to that of middle toe. 



2. Back of tarsus rounded. 



Hind claw longer than its toe and straight; 

 bill rounded, not hooked at tip. 



Alaudidae : Larks, p. 265. 



Fig. 151. 



