Eurasian beaver vs Transparent tunicate

Castor fiber compared with Ciona savignyi

Key Differences

• Eurasian beaver is Vulnerable while Transparent tunicate is Least Concern.

Taxonomic Classification

Rank	Eurasian beaver	Transparent tunicate
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Ascidiacea (Ascidiacea)
Order	Rodentia (Rodents)	Phlebobranchia
Family	Castoridae (Beavers)	Cionidae
Genus	Castor (Beavers)	Ciona
Species	Castor fiber	Ciona savignyi

Evolutionary Relationship

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

Conservation Status

Eurasian beaver

VU — Vulnerable

Transparent tunicate

LC — Least Concern

Physical Characteristics

Attribute	Eurasian beaver	Transparent tunicate
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.

Transparent tunicate

Habitat

Native to Europe and North America and Oceania, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Europe (Norway, Russia), North America (Canada, United States), Oceania and the Pacific (New Zealand), and South America (Argentina).

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 2 countries:

🇳🇴 Norway 🇷🇺 Russia