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	Why do birds have breasts? From: Paul 19/11/2001 20:33:03 Subject: Bird breasts post id: 19949 Why do birds have breasts when they lay eggs? From: G-wiz 19/11/2001 21:05:56 Subject: re: Bird breasts post id: 19951 The term breast has been applied to the pectoralis muscles which they use for flight. They don't have mammary glands which produce milk to feed young like mammals do. The fact that birds lay eggs doesn't mean they could not have evolved with mammary glands however. Echidnas and Platypii are egg laying mammals with mammary glands but not nipples. They have ducts through which the milk is delivered.   Scribbly Gum Forum     Scribbly Gum FAQ