European water vole vs Polynesian rat

Arvicola amphibius compared with Rattus exulans

Key Differences

• European water vole is Near Threatened while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	European water vole	Polynesian rat
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order same	Rodentia (啮齿目)	Rodentia (啮齿目)
Family	Cricetidae	Muridae (Mice & Rats)
Genus	Arvicola	Rattus
Species	Arvicola amphibius	Rattus exulans

Evolutionary Relationship

European water vole and Polynesian rat share a common ancestor at the Order level: Rodentia. (啮齿目)

Conservation Status

European water vole

NT — Near Threatened

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	European water vole	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

European water vole

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Russia, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Polynesian rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical coniferous forests, among 4 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (6 countries), Europe (United Kingdom), North America (United States), Oceania and the Pacific (11 countries), and South America (Chile).