Eurasian beaver vs Pomarine Jaeger

Castor fiber compared with Stercorarius pomarinus

Key Differences

• Eurasian beaver is Vulnerable while Pomarine Jaeger is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Pomarine Jaeger
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Charadriiformes (Charadriiformes)
Family	Castoridae (Beavers)	Stercorariidae
Genus	Castor (Beavers)	Stercorarius
Species	Castor fiber	Stercorarius pomarinus

Evolutionary Relationship

Eurasian beaver and Pomarine Jaeger share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian beaver

VU — Vulnerable

Pomarine Jaeger

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Pomarine Jaeger
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.

Pomarine Jaeger

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela).

Eurasian beaver

Eurasian beaver (Castor fiber) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.

Pomarine Jaeger

Pomarine Jaeger (Stercorarius pomarinus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden