Blue Mason Bee vs Eurasian beaver

Osmia caerulescens compared with Castor fiber

Key Differences

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

Taxonomic Classification

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

Evolutionary Relationship

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

Conservation Status

Blue Mason Bee

LC — Least Concern

Eurasian beaver

VU — Vulnerable

Physical Characteristics

Attribute	Blue Mason Bee	Eurasian beaver
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Mason Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Europe (5 countries), North America (United States), and Oceania and the Pacific (New Zealand).

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.

Blue Mason Bee

The Blue Mason Bee (Osmia caerulescens) is a species in the genus Osmia. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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:

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