Overview

The eastern grey kangaroo (Macropus giganteus) is a large Australian marsupial noted for its powerful hind legs, long tail and upright posture. It is commonly called the eastern grey, great grey, or forester kangaroo. As a marsupial, females carry undeveloped young in a pouch until the joey is able to survive outside. The species is widespread across eastern and southern parts of mainland Australia and occupies a variety of open habitats; reports and introductions elsewhere, such as Tasmania, are less typical and should be regarded separately.

Physical characteristics

Adult eastern greys are among the largest living marsupials. Males can reach about 66 kg (145 lb) and stand close to 2 m (roughly 7 ft) when upright. Fur tends to be soft and grey to brownish, lighter on the belly. Key adaptations include elongated hind limbs and elastic tendons that make hopping an energy-efficient means of travel, and a heavy, muscular tail used for balance and as a support while grazing.

Distribution and habitat

Eastern greys occupy grasslands, woodlands and open forests in much of eastern and southern mainland Australia. Their range and local densities are influenced by rainfall, plant productivity and human land use. For a general map and range notes see distribution sources and regional accounts; isolated or introduced populations are discussed in specific local studies such as those mentioning Tasmania.

Behavior, diet and reproduction

These kangaroos are primarily grazers, feeding on grasses and forbs. They are social, forming groups called mobs that provide protection and social structure. Activity peaks during cooler hours—dawn, dusk and night. Reproduction involves a short gestation followed by a prolonged pouch phase; young, called joeys, remain in the pouch while developing. The species demonstrates reproductive flexibility, including embryonic diapause under certain conditions.

Human interactions and notable facts

  • Conservation: generally common and adaptable; not currently regarded as globally threatened.
  • Economic and cultural role: valued in some regions as a resource, managed through regulation and sometimes culled to reduce agricultural impacts.
  • Comparisons: the eastern grey is the second-largest extant marsupial after the red kangaroo (red kangaroo).

For further reading and species accounts consult field guides and regional wildlife references, or follow authoritative links on marsupial biology and Australian mammals (marsupial overview, distribution notes, regional reports).