The Great Kangaroo is a species of large marsupial found in Australia. It is also known as the 'great grey kangaroo' and is the largest living marsupial. WALLAROO is a common name for three species of macropod, which are closely related to kangaroos. The three species are the Common WALLAROO, the Black WALLAROO, and the Euro. All three species are found in Australia and have similar physical characteristics, such as long hind legs and short forelimbs.