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#CreatureFeature – Rakali (Hydromys chrysogaster) - NACC - Northern Agricultural Catchments Council

#CreatureFeature – Rakali (Hydromys chrysogaster)

What is a Rakali? Rakali are the largest rodents found in Australia. They are also known as water rats because they spend a lot of time in the water. They aren’t entirely nocturnal, and they will look for food during the day as well as the night. They are most often seen at sunset when they are most active.

Location: In Western Australia, it is found in fresh, brackish and marine water in the southwest, and along the coast up to the Kimberley.

What do they look like? Rakali are a secretive species and so they can be hard to spot. They are a large native rodent with black, brown or grey fur. They have a long, thick tail with a distinctive white tip, and have partially webbed hind feet.

Where do they live? Water rats can live anywhere in Australia where there is water all year around. They water can be fresh, brackish or marine, as long as the water is clean and there is lots of vegetation. They like to have old logs and rock ledges about as a place to hide and nest.

Interesting facts: Rakali have partially webbed back feet, almost like a platypus or a duck, to help them swim. Not only are they strong swimmers, but they can also travel long distances on land. Water rats will eat almost anything, including insects, fish, crustaceans, mussels, frogs, lizards, water birds, turtles, turtle eggs and even other small mammals. They will often carry their scavenged food back to a flat area out of the water. They leave behind pieces of shells and bones. This area is called a midden.

Management Actions:

  • Improving management of riverine vegetation and therefore water quality through activities like fencing and revegetation and leaving natural features like logs and rocks.
  • Control of stock access to waterways and of introduced foxes, cats and rodents.
  • Stop using harmful marron traps on private properties or ensure Rakali can’t get into the traps.
  • On a catchment level reduce the inputs into the river from chemicals, fertilisers and sediment through improving agricultural land management practices.

Photo Credit: David Judge

Information Source: https://www.dpaw.wa.gov.au/images/documents/plants-animals/animals/animal_profiles/rakali_fauna_facts_2017.pdf

https://www.wheatbeltnrm.org.au/whats-happening/news/healthy-environments/rakali-rodent-spotlght

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