Eurasian beaver vs Ontong Java Flying Fox

Castor fiber compared with Pteropus howensis

Key Differences

• Eurasian beaver is Vulnerable while Ontong Java Flying Fox is Critically Endangered.

Taxonomic Classification

Rank	Eurasian beaver	Ontong Java Flying Fox
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)	Chiroptera (翼手目)
Family	Castoridae (Beavers)	Pteropodidae (Fruit Bats)
Genus	Castor (Beavers)	Pteropus (Flying Foxes)
Species	Castor fiber	Pteropus howensis

Evolutionary Relationship

Eurasian beaver and Ontong Java Flying Fox share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Eurasian beaver

VU — Vulnerable

Ontong Java Flying Fox

CR — Critically Endangered

Physical Characteristics

Attribute	Eurasian beaver	Ontong Java Flying Fox
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.

Ontong Java Flying Fox

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。