Kangaroos are indigenous to Australia. Current populations stand around 45 million.
Kangaroos are capable of conserving enough water and selecting enough fresh vegetation to survive in an arid environment. The kangaroo’s kidneys efficiently concentrate urine, particularly during summer.
The kangaroo is a marsupial from the family Macropodidae (macropods, meaning "large foot"). In common use the term is used to describe the largest species from this family, especially those of the genus Macropus: the red kangaroo, antilopine kangaroo, eastern grey kangaroo, and western grey kangaroo.