176 



VERTEBRATA : AVES OR BIRDS. 



said to choose their mates for life. The plumage of the 

 young and immature individuals differs greatly from that 



FIG. 208. 



Bird of Prey. Gerfalcon, Falco icelandicus, Sabine. 



of the adult. The Falcons, Hawks, and Eagles are the 

 typical rapacious birds, and constitute the great family 

 of Falconidre. 



The true Falcons (Falco), as the Gerfalcons (Fig. 208) 



