Kangaroo (лат. Macropodidae) is a family of marsupials containing around 60 species which can be encountered mostly in Australia, on Tasmania and New Guinea an nearby islands. There are such species as kangaroos, wallabies, tree-kangaroos, wallaroos, pademelons, quokka. The differ in size: wallaby's length is about 46 cm (18 in) from nose to tail and the biggest kangaroos can be up to 3 m (118,11) long. 

The main distinctive feature of kangaroo family is that most of the young are carried in a pouch. Newsborns are very small and weak. Usually only single young is born and it might weigh less than 1 g (0.035 oz). Then while it is carried in pouch it grows and becomes stronger.