Eurasian beaver vs Rainforest Brown

Castor fiber compared with Cassionympha cassius

Key Differences

• Eurasian beaver is Vulnerable while Rainforest Brown is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Rainforest Brown
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Rodentia (Rodents)	Lepidoptera (Butterflies & Moths)
Family	Castoridae (Beavers)	Nymphalidae (Brush-footed Butterflies)
Genus	Castor (Beavers)	Cassionympha
Species	Castor fiber	Cassionympha cassius

Evolutionary Relationship

Eurasian beaver and Rainforest Brown share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Eurasian beaver

VU — Vulnerable

Rainforest Brown

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Rainforest Brown
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.

Rainforest Brown

Habitat

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.