YERTEBRATA. 
337 
10. Psittaci, or Parrots.—These birds have a strong, 
arched upper bill, with a cere at the base, a fleshy, thick. 
Fig. 322.—Head of a Fly-catcher ( Tyrannus ). 
and movable tongue, and paired toes* They have, usual¬ 
ly, brilliant plumage. They live in trees and feed on 
fruits. Such are the Parrots, Paroquets, and Cockatoos. 
11. Insessores, or Perchers.—This order is the most nu- 
Fig. 323.—Goat-sucker ( Caprimulgus). 
22 
