Archive image from page 423 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansele1874darw Year: 1874 410 THE DESCEIfT OF MAS. rich colors probably serves in chief part as an ornuinent. Like most pugnacious birds, they seem always ready to fight, and when closely confined often kill each other; buu Montagu observed that their pugnacity becomes greatei during the spring, when the long feathers on their necb are fully developed; and at this period the least niovemeu'

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