110 
KEY TO FAMILIES OF LAND BIRDS 
2. Bill long, cutting edges smooth Cuculidae : 
Road-runners, Cuckoos, etc., p. 193. 
Fig. 140. 
2.' Bill short, cutting edge toothed. Trogonidae : 
Trogons, p. 197. 
ORDER PICI: WOODPECKERS. 
Fig. 142. 
Toes 3 or 4, only 2 in front; 
hill chisel-like ; tail fea¬ 
thers stiff and pointed. 
Picidae: 
Woodpeckers, p. 200. 
Fig. 143. Fig. 144. 
ORDER MACROCHIRES: GOATSUCKERS, 
SWIFTS, AND HUMMINGBIRDS. 
Fig. 145. 
1. Bill long and slender, gape not deeply cleft. Trochilidae : 
Hummingbirds, p. 232. 
Fig. 146. 
1'. Bill short, wide at base, gape deeply cleft. 
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. 1 
Toes 4, 3 pointing forward, 1 hack ; 
never united for half their length. 
Fig. 149. 
all on the same level and 
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. 
Fig. 160. 
Fig. 161. 
3. Hind claw longer than its toe and straight; 
bill rounded, not hooked at tip. 
Alaudidae : Larks, p. 265. 
1 See Field Color Key, p. 479. 
