Brown Rat vs Giant Otter

Rattus norvegicus compared with Pteronura brasiliensis

Key Differences

• Brown Rat is Least Concern while Giant Otter is Endangered.

Taxonomic Classification

Rank	Brown Rat	Giant Otter
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)	Carnivora (食肉目)
Family	Muridae (Mice & Rats)	Mustelidae (Weasels & Otters)
Genus	Rattus	Pteronura
Species	Rattus norvegicus	Pteronura brasiliensis

Evolutionary Relationship

Brown Rat and Giant Otter share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

Brown Rat

LC — Least Concern

Giant Otter

EN — Endangered

Physical Characteristics

Attribute	Brown Rat	Giant Otter
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).

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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。

Shared Countries

Both species can be found in 2 countries:

🇨🇴 Colombia 🇻🇪 Venezuela