Eurasian beaver vs Mountain Mason Bee

Castor fiber compared with Osmia inermis

Key Differences

• Eurasian beaver is Vulnerable while Mountain Mason Bee is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Mountain Mason Bee
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Rodentia (Rodents)	Hymenoptera (Ants, Bees & Wasps)
Family	Castoridae (Beavers)	Megachilidae
Genus	Castor (Beavers)	Osmia
Species	Castor fiber	Osmia inermis

Evolutionary Relationship

Eurasian beaver and Mountain Mason Bee share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Eurasian beaver

VU — Vulnerable

Mountain Mason Bee

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Mountain Mason Bee
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.

Mountain Mason Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Luxembourg, Norway, and Sweden.

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 2 countries:

🇳🇴 Norway 🇸🇪 Sweden