Eurasian beaver vs Lesser Crested Tern

Castor fiber compared with Thalasseus bengalensis

Key Differences

• Eurasian beaver is Vulnerable while Lesser Crested Tern is Not Evaluated.

Taxonomic Classification

Rank	Eurasian beaver	Lesser Crested Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Charadriiformes (Charadriiformes)
Family	Castoridae (Beavers)	Laridae
Genus	Castor (Beavers)	Thalasseus
Species	Castor fiber	Thalasseus bengalensis

Evolutionary Relationship

Eurasian beaver and Lesser Crested Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian beaver

VU — Vulnerable

Lesser Crested Tern

NE — Not Evaluated

Physical Characteristics

Attribute	Eurasian beaver	Lesser Crested Tern
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.

Lesser Crested Tern

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

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