Brown Rat vs Nicobar Treeshrew

Rattus norvegicus compared with Tupaia nicobarica

Key Differences

• Brown Rat is Least Concern while Nicobar Treeshrew is Endangered.

Taxonomic Classification

Rank	Brown Rat	Nicobar Treeshrew
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Scandentia (Scandentia)
Family	Muridae (Mice & Rats)	Tupaiidae
Genus	Rattus	Tupaia
Species	Rattus norvegicus	Tupaia nicobarica

Evolutionary Relationship

Brown Rat and Nicobar Treeshrew share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Brown Rat

LC — Least Concern

Nicobar Treeshrew

EN — Endangered

Physical Characteristics

Attribute	Brown Rat	Nicobar Treeshrew
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).

Nicobar Treeshrew

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.