Brown Rat vs Japanese Weasel

Rattus norvegicus compared with Mustela itatsi

Key Differences

• Brown Rat is Least Concern while Japanese Weasel is Near Threatened.

Taxonomic Classification

Rank	Brown Rat	Japanese Weasel
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class same	Mammalia (lớp Thú)	Mammalia (lớp Thú)
Order	Rodentia (Bộ Gặm nhấm)	Carnivora (bộ Ăn thịt)
Family	Muridae (Mice & Rats)	Mustelidae (Weasels & Otters)
Genus	Rattus	Mustela
Species	Rattus norvegicus	Mustela itatsi

Evolutionary Relationship

Brown Rat and Japanese Weasel share a common ancestor at the Class level: Mammalia. (lớp Thú)

Conservation Status

Brown Rat

LC — Least Concern

Japanese Weasel

NT — Near Threatened

Physical Characteristics

Attribute	Brown Rat	Japanese Weasel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

Japanese Weasel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Japan. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 1 countries:

🇯🇵 Japan