334 



COMPARATIVE ZOOLOGY. 



The wings are adapted for rapid or long flight ; and they 

 hop, rather than walk, on the ground. 170 They always 

 live in pairs ; and the young are hatched helpless. 



8. Eaptores, or Birds of Prey, differ from all other 

 Birds, except Parrots, in having a 

 strongly hooked bill and a waxy 

 membrane (cere) at the base of the 

 upper mandible ; and from Parrots, 



FIG. 317 Barn-owl (Strix flam- 

 ). Both hemispheres. 



Fish -hawk (Pandion Carolinr.wsis}. 

 United States. 



in having three toes in front and one behind. The toes 

 are armed with long, strong, crooked talons ; the legs are 

 robust ; and the wings are of considerable size, adapted 



FIG. 319. Golden Eagle (Aquila chrysaetos). North America and Europe. 



