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. 



/-^"O^ \ 

 giSi- \ 



2. Eyes not surrounded by striking 

 discs of radiating feathers. 



VFalconidae: Falcons, 

 Kites, Hawks, Eagles, 

 etc., p. 146. Fig. 133. 



Fig. 132. 



Fig 135. 



2'. Eyes surrounded by striking discs 

 of radiating feathers. 



3. Inner edge of middle claw 



toothed . . . Strigidee : 



Barn Owls, p. 173. 



3'. Inner edge of middle claw not 



toothed . . Bubonidae : 



Horned Owls, etc., 



p. 175. 



Fig. 136. 



ORDER PSITTACI: PARROTS. 



Toes 4, 2 in front, 2 behind ; outer toe perma- 



nently reversed ..... Fsittacidae : 



Parrots, p. 192. 



ORDER COCCYGES : CUCKOOS, 

 TROGONS, KINGFISHERS, 

 ETC. 



Fig. 137. 



1. Toes 4, 3 pointing forward, 1 back Alcedinidae : 



Kingfishers, p. 198. 



1'. Toes 4, 2 pointing forward, 2 back. 



Fig. 139. 



