Eurasian beaver vs Greater Eastern Peaclam

Castor fiber compared with Pisidium dubium

Key Differences

• Eurasian beaver is Vulnerable while Greater Eastern Peaclam is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Greater Eastern Peaclam
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Rodentia (Rodents)	Sphaeriida (Sphaeriida)
Family	Castoridae (Beavers)	Sphaeriidae
Genus	Castor (Beavers)	Pisidium
Species	Castor fiber	Pisidium dubium

Evolutionary Relationship

Eurasian beaver and Greater Eastern Peaclam share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Eurasian beaver

VU — Vulnerable

Greater Eastern Peaclam

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Greater Eastern Peaclam
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.

Greater Eastern Peaclam

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States.

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.