Eurasian beaver vs squirrel’s tail hydroid

Castor fiber compared with Sertularia argentea

Key Differences

• Eurasian beaver is Vulnerable while squirrel’s tail hydroid is Not Evaluated.

Taxonomic Classification

Rank	Eurasian beaver	squirrel’s tail hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Cnidaria (Cnidarians)
Class	Mammalia (Mammals)	Hydrozoa (Hydrozoa)
Order	Rodentia (Rodents)	Leptothecata (Leptothecata)
Family	Castoridae (Beavers)	Sertulariidae
Genus	Castor (Beavers)	Sertularia
Species	Castor fiber	Sertularia argentea

Evolutionary Relationship

Eurasian beaver and squirrel’s tail hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Eurasian beaver

VU — Vulnerable

squirrel’s tail hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	Eurasian beaver	squirrel’s tail hydroid
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.

squirrel’s tail hydroid

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

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 🇸🇪 Sweden