What is a water mouse called? - briefly
The animal often called a water mouse is the water vole (Arvicola amphibius), a semi‑aquatic rodent found in Europe and parts of Asia. In South America, similar species belong to the genus Nectomys and are commonly referred to as water rats.
What is a water mouse called? - in detail
The creature commonly referred to as a water mouse belongs to the genus Nectomys, a group of semiaquatic rodents in the family Cricetidae. Species within this genus are often called “Neotropical water mice” or simply “water rats.” The most frequently cited members are Nectomys squamipes, Nectomys rattus, and Nectomys apicalis.
Taxonomy and nomenclature
- Order: Rodentia
- Family: Cricetidae
- Genus: Nectomys
- Common names: water mouse, Neotropical water mouse, water rat
Geographic range
- Distribution spans the Amazon basin, the Guianas, eastern Brazil, and parts of Central America.
- Habitats include riverbanks, floodplain forests, and swamps, where the animals remain close to water sources.
Morphology
- Body length: 12–18 cm; tail length roughly equal to body.
- Dense, water‑repellent fur, usually brown to gray.
- Webbed hind feet enhance swimming ability.
Behavior and ecology
- Primarily nocturnal; forages on the ground and in shallow water.
- Diet consists of aquatic insects, crustaceans, small fish, and fallen fruits.
- Constructs nests from vegetation near water, often in burrows with waterproof entrances.
Reproduction
- Breeding season varies with latitude; litters average 3–5 young.
- Gestation period about 30 days; young are weaned after three weeks.
Conservation status
- Most species are listed as Least Concern by the IUCN, though habitat loss from deforestation and water pollution poses localized threats.
In summary, the term “water mouse” designates several Nectomys species, semiaquatic rodents native to tropical South and Central America, characterized by adaptations for a life closely tied to freshwater environments.