Canadian beaver vs Desmarest’s Spiny Pocket Mouse

Castor canadensis compared with Heteromys desmarestianus

Key Differences

• Canadian beaver is Not Evaluated while Desmarest’s Spiny Pocket Mouse is Least Concern.

Taxonomic Classification

Rank	Canadian beaver	Desmarest’s Spiny Pocket Mouse
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order same	Rodentia (ネズミ目)	Rodentia (ネズミ目)
Family	Castoridae (Beavers)	Heteromyidae
Genus	Castor (Beavers)	Heteromys
Species	Castor canadensis	Heteromys desmarestianus

Evolutionary Relationship

Canadian beaver and Desmarest’s Spiny Pocket Mouse share a common ancestor at the Order level: Rodentia. (ネズミ目)

Conservation Status

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Desmarest’s Spiny Pocket Mouse

LC — Least Concern

Physical Characteristics

Attribute	Canadian beaver	Desmarest’s Spiny Pocket Mouse
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).

Desmarest’s Spiny Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Canadian beaver

北米最大の齧歯類であるカナダビーバーは体重32kgにも達し、カナダ・米国北部の河川、湖沼、湿地に生息する優れた生態系エンジニアです。木を倒して数百メートルに及ぶダムを造ることで池を形成し、数百種の生息環境を提供します。その巣穴や運河は流域全体を変化させます。かつては毛皮のために絶滅寸前まで狩られましたが、個体数は大きく回復しています。