Eastern Gray Kangaroo

Macropus giganteus

A young eastern gray kangaroo, known as a joey, peers from its mother's pouch.

Photograph by Nicole Duplaix

Map

Eastern Gray Kangaroo Range

Fast Facts

Type:: Mammal
Diet:: Herbivore
Average life span in the wild:: 8 to 10 years
Size:: Up to 7 ft. (2.1 m)
Weight:: Up to 120 lbs (54 kg)
Group name:: Mob
Did you know?: A gray kangaroo can hop along at speeds of over 35 mi (56 km) an hour.
Size relative to a 6-ft (2-m) man:

Gray kangaroos roam the forests of Australia and Tasmania and prefer to live among the trees, though they do take to open grasslands for grazing.

Gray kangaroos, red kangaroos, and wallaroos are called the great kangaroos because they are so much larger than the nearly 70 other kinds of kangaroos.

Gray kangaroos hop along on their powerful hind legs and do so at great speed. A gray kangaroo can reach speeds of over 35 miles (56 kilometers) an hour and travel for long distances at 15 miles (24 kilometers) an hour. Their bounding gate allows them to cover 25 feet (8 meters) in a single leap and to jump 6 feet (1.8 meters) high.

Females have one baby at a time, which at birth is smaller than a cherry. The infant immediately climbs into its mother's pouch and does not emerge for two months. Until they reach about 10 or 11 months of age, threatened young kangaroos, called joeys, will quickly dive for the safety of mom's pouch. As they grow, joeys' heads and feet can often be seen hanging out of the pouch.

Larger male kangaroos are powerfully built. Like many species, male kangaroos sometimes fight over potential mates. They often lean back on their sturdy tail and "box" each other with their strong hind legs. Kangaroos can also bite and wield sharp claws, which they may do in battle with an enemy, such as a dingo.

Gray kangaroos gather in groups called "mobs." Aboriginal and European Australians have spent centuries clearing open tracts of land and establishing water sources—both of which are boons to kangaroo populations. Many millions of these animals roam Australia, and considerable numbers are killed each year for their skins and meat, which is becoming a more popular human food.

Mammal Videos

Other Australian Animals

Mammal Features

Howling Mouse App

Meet the cutest, deadliest critter to have its own app! Now available in the App store.
Cause an Uproar

Big cats are quickly disappearing. Now is the time to act. Cause an uproar to save big cats today.
Big Cat Cub Pictures

The world’s top felines—including lions, tigers, cheetahs, and leopards—are slipping toward extinction. Browse this gallery of big cat cubs and learn more about the threats they face.
Endangered Animals Quiz

The loss of animal species is irreversible and potentially catastrophic, not to mention heartrendingly sad. Where do we stand? Face the facts with this quiz.