410 



THE DESCENT OF MAN. 



rich colors probably serves in chief part as an ornament* 

 Like most pugnacious birds, they seem always ready to 



fight, and when closely confined often kill each other; but 

 Montagu observed that their pugnacity becomes greater 

 during the spring, when the long feathers on their necks 

 are fully developed; and at this period the least movement 



