Brown Rat vs North American least shrew

Rattus norvegicus compared with Cryptotis parva

Taxonomic Classification

Rank	Brown Rat	North American least shrew
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	Rodentia (啮齿目)	Soricomorpha (鼩形目)
Family	Muridae (Mice & Rats)	Soricidae
Genus	Rattus	Cryptotis
Species	Rattus norvegicus	Cryptotis parva

Evolutionary Relationship

Brown Rat and North American least shrew share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

Brown Rat

LC — Least Concern

North American least shrew

LC — Least Concern

Physical Characteristics

Attribute	Brown Rat	North American least shrew
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).

North American least shrew

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Brown Rat

褐家鼠（Rattus norvegicus）在IUCN红色名录中被列为无危（LC）。其分布广泛，种群数量稳定，无紧迫保护关切。