Eurasian beaver vs Irrawaddy dolphin

Castor fiber compared with Orcaella brevirostris

Key Differences

• Eurasian beaver is Vulnerable while Irrawaddy dolphin is Endangered.

Taxonomic Classification

Rank	Eurasian beaver	Irrawaddy dolphin
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	Rodentia (ネズミ目)	Cetacea (Whales & Dolphins)
Family	Castoridae (Beavers)	Delphinidae (Oceanic Dolphins)
Genus	Castor (Beavers)	Orcaella
Species	Castor fiber	Orcaella brevirostris

Evolutionary Relationship

Eurasian beaver and Irrawaddy dolphin share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Eurasian beaver

VU — Vulnerable

Irrawaddy dolphin

EN — Endangered

Physical Characteristics

Attribute	Eurasian beaver	Irrawaddy dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Eurasian beaver

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Eurasian beaver

ユーラシアビーバー（Castor fiber）はIUCNレッドリストで絶滅危惧II類（VU）に分類されています。個体群の減少と生息地への圧力の増大により、野生での絶滅危険度が高い状況に直面しています。