Eurasian beaver vs Zeledon’s Mouse Opossum

Castor fiber compared with Marmosa zeledoni

Key Differences

• Eurasian beaver is Vulnerable while Zeledon’s Mouse Opossum is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Zeledon’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Didelphimorphia (Didelphimorphia)
Family	Castoridae (Beavers)	Didelphidae
Genus	Castor (Beavers)	Marmosa
Species	Castor fiber	Marmosa zeledoni

Evolutionary Relationship

Eurasian beaver and Zeledon’s Mouse Opossum share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Eurasian beaver

VU — Vulnerable

Zeledon’s Mouse Opossum

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Zeledon’s Mouse Opossum
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.

Zeledon’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Ecuador.

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.