Eurasian beaver vs Grizzled Colilargo

Castor fiber compared with Oligoryzomys griseolus

Key Differences

• Eurasian beaver is Vulnerable while Grizzled Colilargo is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Grizzled Colilargo
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Rodentia (Rodents)	Rodentia (Rodents)
Family	Castoridae (Beavers)	Cricetidae
Genus	Castor (Beavers)	Oligoryzomys
Species	Castor fiber	Oligoryzomys griseolus

Evolutionary Relationship

Eurasian beaver and Grizzled Colilargo share a common ancestor at the Order level: Rodentia. (Rodents)

Conservation Status

Eurasian beaver

VU — Vulnerable

Grizzled Colilargo

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Grizzled Colilargo
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.

Grizzled Colilargo

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

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.