Marsupial babies are born very tiny and undeveloped. Straight after birth the babies attach themselves to their mother's nipples. The babies stay attached until they develop more completely. The nipples of most female marsupials are in a pouch on the stomach. Not all female marsupials have a pouch. All marsupials are mammals. Kangaroos, koalas, quolls, and gliders are marsupials. 


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