This is the species of Kangaroo that you are most likely to see if you visit Australia, even though it tends to avoid humans.
Eastern grey kangaroo
The Eastern grey kangaroo lives in small groups but may congregate in large numbers when feeding.
It is usually active from late afternoon until early morning, resting in the shade of trees and shrubs during the day.
Strong, muscular legs propel the animal across the grasslands at speeds of 40 mph (60kmh). They are able to cleared lengths of 25 feet (8 meters) and heights of 9 feet (3 meters).
Eastern grey kangaroos generally give birth to one infant at a time but twins have been reported.
Western grey kangaroo
The Western grey kangaroo looks much like the Eastern grey kangaroo, and for many years was treated as subspecies.
They vary in colour, being anywhere from greyish-brown to chocolate brown.
The muzzle is covered in fine hair.
The Western grey kangaroo males are known as stinkers due to their strong, curry-like smell.
Western grey kangaroos are also very vocal. The mothers communicate to their joeys with a series of clicks.