Marsupials are known as non-placental mammals that are belonging to the order “Marsupialia”. They have an external pouch called marsupium. In marsupium, after birth the immature young are raised. After birth, newborn naturally crawl to this pouch for their nourishment. For this purpose they attach themselves to milk-secreting teats. Kangaroos, opossums, bandicoots, wombats, and the flying phalange are well-known marsupials. 95% mammals are placental. They are found in Australia, New Guinea, Tasmania, and the America. There are about 330 species of marsupials. In their reproductive traits, Marsupials differ from placental mammals. In contrast to the male two-pronged penis, female has two vaginas.
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