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Science & Nature • Mammal

Koala

The koala is a tree-dwelling marsupial native to Australia, known for its specialised eucalyptus diet and pouch-raised young.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The koala is a tree-dwelling marsupial native to Australia, known for its specialised eucalyptus diet and pouch-raised young. Often called a "koala bear," it is not a bear but a marsupial. Conservation listings vary by region, with some populations considered endangered in parts of Australia.

Description

Koalas are tree-dwelling marsupials with thick grey fur, large ears, and strong climbing claws. They spend much of their time resting in trees and are closely associated with eucalyptus forests.

Habitat and range

Koalas live in eastern and south-eastern Australia, including parts of Queensland, New South Wales, Victoria, and South Australia. They are found in eucalypt forests, woodlands, and some coastal or island habitats.

Diet and behaviour

Koalas feed mainly on eucalyptus leaves, which are low in energy and difficult to digest. This diet contributes to their long daily sleep periods and generally low activity levels.

Reproduction

Female koalas give birth to very small, underdeveloped young that crawl into the pouch after birth. The baby koala, called a joey, develops further in the pouch before later riding on the mother’s back.

Conservation

Koala conservation status differs by authority and region. Some populations in Australia are listed as endangered, while global assessments have listed the species as vulnerable.

Key facts

  • Koalas are marsupials, not bears.
  • They are native to Australia and live mainly in eastern and south-eastern regions.
  • Their diet consists almost entirely of eucalyptus leaves.
  • Koalas sleep for most of the day because their diet is low in energy.
  • A baby koala is called a joey.
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Canadian context

Koalas are of interest to Canadian readers mainly through wildlife education, zoo and conservation coverage, and school reference material about marsupials and Australian ecosystems.

Frequently asked questions

What is a koala?
A koala is a tree-dwelling Australian marsupial, not a bear.
Where do koalas live?
Koalas live in eastern and south-eastern Australia, mainly in eucalyptus forests and woodlands.
What do koalas eat?
Koalas eat almost exclusively eucalyptus leaves.
Are koalas endangered?
Some Australian koala populations are listed as endangered, while broader conservation assessments have listed the species as vulnerable.
How long do koalas sleep?
Koalas typically sleep up to 20–22 hours a day.
What is a baby koala called?
A baby koala is called a joey.

References

  1. National Geographichttps://www.nationalgeographic.com/animals/mammals/facts/koala
    Supports: Koalas are marsupials, tree-climbing animals native to Australia.
  2. New South Wales Environment and Heritagehttps://www.environment.nsw.gov.au/topics/animals-and-plants/native-animals/native-animal-facts/koala
    Supports: Koala habitat, sleeping behaviour, reproduction, and regional conservation status.
  3. Britannicahttps://www.britannica.com/animal/koala
    Supports: Koala classification, range, diet, and baby name.
  4. Australian Government Tourism Australiahttps://www.australia.com/en-us/things-to-do/wildlife/facts-about-koalas.html
    Supports: Baby koala is called a joey.
  5. IFAWhttps://www.ifaw.org/journal/koala-faq
    Supports: Koala conservation status and joey terminology.
  6. Australian Geographichttps://www.australiangeographic.com.au/fact-file/fact-file-koala-phascolarctos-cinereus/
    Supports: Diet, sleep duration, and endangered status in some Australian jurisdictions.