""The term breast in birds (for example little fenale hawks) 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. However, the fact that birds lay eggs doesn't mean they could not have evolved with mammary glands. Echidnas and Platypii are egg laying mammals with mammary glands but not nipples. They have ducts through which the milk is delivered.

Platypus and echidna babies are considered to be the cutest... and some say the ugliest! You can make up your mind here, after seeing this wonderful series of images (by an exclusive permission of Australian photographer Den Whitton).""



Aren't they cute-ugly?