30 
KEY TO BIRDS 
m, Feet powerful for hold- 
ing prey; claws long, 
strong, sharp, and 
curved. 
10, Naked cere at base of bill. 
Tarsus always (except 
on Rough-legged Hawk, 
and Golden Eagle) bare. 
Toes always bare (Figure 
32). 
Figures 32 and 33 
a 
Figure 34 
Hawks and Eagles 
p. 116 
11, Cere hidden in feathers; eye 
in centre of more or less circular 
feather disks. Tarsus and toes 
feathered (Figure 33). 
Figure 35 
* 
Owls 
p. 255 
n, Feet small and weak. 
12, Nostrils opening in a soft and somewhat 
swollen base. 
Pigeons 
p. 249 
