Marsupials (Marsupialia) are a group of mammals that give birth to their young at an early stage of their development. After their birth, the young crawl up the mother's body and into the safety of her marsupium—a pouch located on the mother's abdomen. Once inside the marsupium, the baby attaches to a nipple and nurses until it is large enough to leave the pouch and better fend for itself in the outside world.
Marsupials are a group of mammals that are divided into two main groups, the American marsupials and the Australian marsupials. The American marsupials include opossums and shrew opossums. The Australian marsupials include the Tasmanian devil, numbats, bandicoots, wombats, marsupial moles, pygmy possums, koalas, kangaroos, wallabies and many others. There are 292 species of marsupials alive today.