Canadian beaver vs Lesser Short-tailed Rat

Castor canadensis compared with Brachyuromys betsileoensis

Key Differences

• Canadian beaver is Not Evaluated while Lesser Short-tailed Rat is Least Concern.

Taxonomic Classification

Rank	Canadian beaver	Lesser Short-tailed 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	Castoridae (Beavers)	Nesomyidae
Genus	Castor (Beavers)	Brachyuromys
Species	Castor canadensis	Brachyuromys betsileoensis

Evolutionary Relationship

Canadian beaver and Lesser Short-tailed Rat share a common ancestor at the Order level: Rodentia. (啮齿目)

Conservation Status

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Lesser Short-tailed Rat

LC — Least Concern

Physical Characteristics

Attribute	Canadian beaver	Lesser Short-tailed Rat
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	1.0 m	—
Average Weight	25.0 kg	—

Habitat & Geographic Range

Canadian beaver

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Widely distributed across Europe (15 countries), North America (United States), and South America (Argentina, Chile).

Lesser Short-tailed Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Canadian beaver

北美最大的啮齿动物加拿大河狸体重可达32公斤，是栖息于加拿大和美国北部河流、湖泊和湿地的杰出生态系统工程师。通过伐木和建造可达数百米的水坝形成水塘，为数百种物种提供生境。其巢穴和运河改变了整个流域。曾因毛皮贸易被猎杀至濒临灭绝，但种群已大幅恢复。