Canadian beaver vs Northern, Pribilof, or Alaska fur seal

Castor canadensis compared with Callorhinus ursinus

Key Differences

• Canadian beaver is Not Evaluated while Northern, Pribilof, or Alaska fur seal is Vulnerable.

Taxonomic Classification

Rank	Canadian beaver	Northern, Pribilof, or Alaska fur seal
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Carnivora (Carnivorans)
Family	Castoridae (Beavers)	Otariidae
Genus	Castor (Beavers)	Callorhinus
Species	Castor canadensis	Callorhinus ursinus

Evolutionary Relationship

Canadian beaver and Northern, Pribilof, or Alaska fur seal share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Northern, Pribilof, or Alaska fur seal

VU — Vulnerable

Physical Characteristics

Attribute	Canadian beaver	Northern, Pribilof, or Alaska fur seal
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	1.0 m	—
Average Weight	25.0 kg	—

Habitat & Geographic Range

Canadian beaver

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Widely distributed across Europe (15 countries), North America (United States), and South America (Argentina, Chile).

Northern, Pribilof, or Alaska fur seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Russia and Ukraine. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Canadian beaver

The largest rodent in North America, Canadian beavers weigh up to 32 kg and are master ecosystem engineers inhabiting rivers, lakes, and wetlands across Canada and the northern United States. By felling trees and constructing dams up to hundreds of meters long, beavers create ponds that provide habitat for hundreds of species. Their lodges and canals transform entire watersheds. Once nearly hunted to extinction for their fur, beaver populations have recovered strongly.

Shared Countries

Both species can be found in 2 countries:

🇷🇺 Russia 🇺🇦 Ukraine