Canadian beaver vs Emerald Spreadwing

Castor canadensis compared with Lestes dryas

Key Differences

• Canadian beaver is Not Evaluated while Emerald Spreadwing is Vulnerable.

Taxonomic Classification

Rank	Canadian beaver	Emerald Spreadwing
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Arthropoda (節足動物)
Class	Mammalia (哺乳類)	Insecta (昆虫)
Order	Rodentia (ネズミ目)	Odonata (蜻蛉目)
Family	Castoridae (Beavers)	Lestidae
Genus	Castor (Beavers)	Lestes
Species	Castor canadensis	Lestes dryas

Evolutionary Relationship

Canadian beaver and Emerald Spreadwing share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Emerald Spreadwing

VU — Vulnerable

Physical Characteristics

Attribute	Canadian beaver	Emerald Spreadwing
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).

Emerald Spreadwing

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (5 countries) and North America (United States). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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。

Emerald Spreadwing

エメラルドスプレッドウィング（Lestes dryas）は、IUCNレッドリストで危急（VU）に分類されています。野生での絶滅リスクが高く、個体群は減少し、生息地への圧力が増大しています。

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇱🇺 Luxembourg 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States