Eurasian beaver vs sei whale

Castor fiber compared with Balaenoptera borealis

Key Differences

• Eurasian beaver is Vulnerable while sei whale is Endangered.

Taxonomic Classification

Rank	Eurasian beaver	sei whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Cetacea (Whales & Dolphins)
Family	Castoridae (Beavers)	Balaenopteridae (Rorquals)
Genus	Castor (Beavers)	Balaenoptera (Rorquals)
Species	Castor fiber	Balaenoptera borealis

Evolutionary Relationship

Eurasian beaver and sei whale share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Eurasian beaver

VU — Vulnerable

sei whale

EN — Endangered

Physical Characteristics

Attribute	Eurasian beaver	sei whale
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.

sei whale

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Shared Countries

Both species can be found in 4 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden