Eurasian beaver vs Slippery Jack

Castor fiber compared with Suillus luteus

Key Differences

• Eurasian beaver is Vulnerable while Slippery Jack is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Slippery Jack
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Mammalia (Mammals)	Agaricomycetes (Mushrooms)
Order	Rodentia (Rodents)	Boletales (Boletales)
Family	Castoridae (Beavers)	Suillaceae
Genus	Castor (Beavers)	Suillus
Species	Castor fiber	Suillus luteus

Conservation Status

Eurasian beaver

VU — Vulnerable

Slippery Jack

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Slippery Jack
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.

Slippery Jack

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Brazil, Chile).

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 3 countries:

🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden