What is the name of a rat that swims in a river? - briefly
The creature is commonly referred to as a water rat. Its scientific name is Hydromys chrysogaster.
What is the name of a rat that swims in a river? - in detail
The animal commonly referred to as a “water rat” is an aquatic rodent belonging to the family Muridae. Several species fit this description, most notably members of the genus Nectomys found in South‑American river systems and the Australian water rat (Hydromys chrysogaster). These mammals possess webbed hind feet, dense waterproof fur, and a streamlined body that enable efficient swimming and diving.
Key characteristics of aquatic rats include:
- Morphology: elongated skull, strong jaws, and partially webbed paws; fur repels water and provides insulation.
- Habitat: freshwater streams, rivers, marshes, and flood‑plain wetlands; they construct burrows near water sources.
- Diet: omnivorous, feeding on aquatic insects, small fish, crustaceans, seeds, and vegetation.
- Behavior: nocturnal foragers, capable of staying submerged for several minutes; they use tail and hind limbs for propulsion.
- Reproduction: breeding peaks during the rainy season; litters typically contain 2‑5 young, which are raised in dry sections of the burrow.
The term “muskrat” is often mistakenly applied to these swimmers, but muskrats belong to a different family (Cricetidae) and occupy a distinct ecological niche. In scientific literature, the precise designation for the swimming rodent varies by region: South America uses “Nectomys” species, while Australia refers to Hydromys chrysogaster as the water rat. All share adaptations that make them proficient swimmers in riverine environments.