Eurasian beaver vs Northern Birch Mouse

Castor fiber compared with Sicista betulina

Key Differences

• Eurasian beaver is Vulnerable while Northern Birch Mouse is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Northern Birch Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Rodentia (Rodents)	Rodentia (Rodents)
Family	Castoridae (Beavers)	Dipodidae
Genus	Castor (Beavers)	Sicista
Species	Castor fiber	Sicista betulina

Evolutionary Relationship

Eurasian beaver and Northern Birch Mouse share a common ancestor at the Order level: Rodentia. (Rodents)

Conservation Status

Eurasian beaver

VU — Vulnerable

Northern Birch Mouse

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Northern Birch Mouse
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.

Northern Birch Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Denmark, Norway, Russia, Sweden, and Ukraine.

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 🇷🇺 Russia 🇸🇪 Sweden