Eurasian beaver vs Lesser Siren

Castor fiber compared with Siren intermedia

Key Differences

• Eurasian beaver is Vulnerable while Lesser Siren is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Lesser Siren
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Rodentia (Rodents)	Caudata (Caudata)
Family	Castoridae (Beavers)	Sirenidae
Genus	Castor (Beavers)	Siren
Species	Castor fiber	Siren intermedia

Evolutionary Relationship

Eurasian beaver and Lesser Siren share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian beaver

VU — Vulnerable

Lesser Siren

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Lesser Siren
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.

Lesser Siren

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Distributed across Belgium and Mexico.

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 1 countries:

🇧🇪 Belgium