Kangaroos are marsupials of macropodae. The term is usually used to describe the largest species in the family, especially Macropus: red kangaroo, anti lopine kangaroo, eastern grey kangaroo and Western grey kangaroo. Kangaroos are indigenous to Australia. The Australian government estimates that 34.3 million kangaroos lived in the Australian commercial harvest in 2011, up from 25.1 million a year ago.

Like the terms "kangaroo" and "kangaroo," kangaroo "refers to a multi-ethnic group of species. All three refer to members of the same classification family Macropodidae, and are differentiated according to size. The largest species in the family is called "kangaroo", and the smallest is usually called "little kangaroo". The term "kangaroo" refers to a medium-sized species. Kangaroos also belong to another species of megapoda, inhabiting tropical rainforests in New Guinea, northeast Queensland and some islands in the region.

Kangaroo's hind legs are big and powerful. Its big feet are suitable for jumping. Its long muscle tail can keep balance and its head is small. Like most marsupials, a female kangaroo has a pouch called a marsupials, in which Joey completes the entire postnatal development.

The adaptability of large kangaroo is much better than that of small kangaroo, which can be used for pasture agriculture and habitat change brought by human beings to Australian landscape. Many smaller species are rare and endangered, while kangaroos are relatively abundant.

Kangaroo is the symbol of Australia. It appears on the emblem of Australia and some of its coins, and is used by some famous organizations in Australia, including Qantas and the Royal Australian Air Force. Kangaroo is very important for Australian culture and national image, so there are many popular cultural references.

Wild kangaroos are shot to eat meat, leather and protect pastures. Although controversial, kangaroo meat has health benefits for human consumption compared with traditional meat due to its low fat content.