Where Do Platypuses Live? Rivers of Eastern Australia

The platypus range in Australia

The platypus is endemic to Australia, meaning it lives nowhere else in the wild. Its range follows the wetter eastern side of the continent, mostly east of the Great Dividing Range and in rivers that flow inland from it.

On Kangaroo Island, off South Australia, platypuses were released by people in the first half of the 20th century, starting in the 1920s. Their descendants live mostly in the island’s west, in and around Flinders Chase National Park. The 2019–20 bushfires burned much of this area, but platypuses were seen again in the following months.

The original mainland population of South Australia, along the lower Murray River, had disappeared by the late 20th century. Only small numbers now live in sanctuaries there.

What kind of habitat do platypuses need?

Platypuses are semiaquatic: they feed in water but rest on land, in burrows. A good platypus habitat has several features:

• Permanent fresh water. Rivers, creeks, lakes, lagoon-like pools and even some farm dams, as long as water remains year-round.
• Stable earth banks. Steep banks held together by tree roots and overhanging plants are ideal for burrows.
• Plenty of bottom-dwelling prey. Insect larvae, shrimps, yabbies and worms live best in clean water over gravel, logs and leaf litter. See How do platypuses find food? for how they hunt.
• Shelter. Logs, roots and overhanging vegetation give cover from predators.

Within these limits, platypuses are surprisingly adaptable. They live in tropical rainforest streams in north Queensland, in rivers that pass through farmland and suburbs, and in cold alpine streams and lakes above 1,000 m (3,300 ft) in the Australian Alps and Tasmania, where the water can be close to freezing in winter. Their thick, waterproof fur and low body temperature help them cope with the cold.

Platypus burrows

A platypus spends roughly half the day in water and the rest in a burrow dug into the bank. The entrance is usually just above the waterline and is often hidden among roots or plants.

There are two main types of burrow:

• Resting burrows, used by both sexes, are fairly short, often just a few meters long. A platypus may use several along its stretch of river.
• Nesting burrows, dug by breeding females, are much longer and can exceed 20 m (65 ft). The female lines a chamber with wet leaves and grass and blocks the tunnel with plugs of soil while she incubates her eggs and nurses her young.

These burrows are an important part of why the platypus, an egg-laying mammal, can raise its young safely. Read more about its unusual breeding in Is a platypus a mammal?.

How much space does a platypus need?

Platypuses are mostly solitary and stay in a home range along a river. Home ranges vary from well under 1 km to about 7 km (4.3 mi) of waterway. Animals living in streams tend to have larger ranges than those in ponds and lakes.

The range of one male often overlaps those of several females. Young platypuses leave their mother’s area once they are independent, and young males usually travel farther than young females before settling.

Threats to platypus habitat

The platypus is listed as Near Threatened on the IUCN Red List (2016), and its population is decreasing. Most of the threats affect the places it lives:

• Drought and water extraction. When rivers dry into isolated pools, platypuses lose food and may have to cross land, where foxes, dogs and cats can catch them. Climate change is expected to make long droughts more frequent.
• Dams and changed river flows. Dams block movement along rivers and alter the water temperature and flow that prey insects depend on.
• Land clearing. Removing trees from riverbanks leads to erosion, collapsing banks and silted-up stream beds.
• Nets, traps and litter. Platypuses can drown in enclosed yabby traps and get caught in discarded fishing line, plastic loops and rubber bands.

Declines have been especially severe in parts of the Murray–Darling Basin in the southeast. Victoria now lists the platypus as Vulnerable under state law, and it is listed as Endangered in South Australia.

Where to see platypuses in the wild

Seeing a wild platypus takes patience. Watch a quiet pool early in the morning or around dusk, keep still, and look for a small dark shape at the surface, a trail of bubbles, or a series of rings where the animal has just dived.

Well-known viewing areas include the creeks of the Atherton Tableland and Eungella National Park in Queensland and many rivers in Tasmania, where the town of Latrobe calls itself the platypus capital of the world. Several wildlife sanctuaries in Victoria and New South Wales also keep platypuses for visitors.

For other animals found only on this continent, see Australian animals.