Eurasian beaver vs Feathered slender

Castor fiber compared with Caloptilia cuculipennella

Key Differences

• Eurasian beaver is Vulnerable while Feathered slender is Near Threatened.

Taxonomic Classification

Rank	Eurasian beaver	Feathered slender
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)	Gracillariidae
Genus	Castor (Beavers)	Caloptilia
Species	Castor fiber	Caloptilia cuculipennella

Evolutionary Relationship

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

Conservation Status

Eurasian beaver

VU — Vulnerable

Feathered slender

NT — Near Threatened

Physical Characteristics

Attribute	Eurasian beaver	Feathered slender
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.

Feathered slender

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Asia (Japan), Europe (7 countries), and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇷🇺 Russia 🇸🇪 Sweden