KEY TO FAMILIES OF LAND BIRDS 
109 
ORDER RAPTORES: VULTURES, EAGLES, 
HAWKS, OWLS, ETC. 
1. Head naked, feet not suited for 
grasping. . . Cathartidae: 
Vultures, p. 144. 
1'. Head feathered, feet especially 
adapted for grasping. 
Fig. 130. 
Fig. 132. 
Fig. 131. 
2. Eyes not surrounded by striking 
discs of radiating feathers. 
Falconidae: Falcons, 
Kites, Hawks, Eagles, 
etc., p. 146. Fig. 133. 
2'. Eyes surrounded by striking discs 
of radiating feathers. 
Fig. 134. 
Fig. 135. Fig. 136. 
3. Inner edge of middle claw 
toothed . . . Strigidae: 
Barn Owls, p. 173. 
3'. Inner edge of middle claw not 
toothed . . Bubonidae: 
Horned Owls, etc., 
p. 175. 
ORDER PSITTACI: PARROTS. 
Toes 4, 2 in front, 2 behind; outer toe perma¬ 
nently reversed. Psittacidae : 
Parrots, p. 192. 
ORDER COCCYGES : CUCKOOS, 
TROGONS, KINGFISHERS, 
ETC. 
Fig. 137. 
Fig. 138. 
1. Toes 4, 3 pointing forward, 1 back Alcedinidae : 
Kingfishers, p. 198. 
I 1'. Toes 4, 2 pointing forward, 2 back. 
