Canadian beaver vs Olive-gray Thomasomys

Castor canadensis compared with Thomasomys cinereus

Key Differences

• Canadian beaver is Not Evaluated while Olive-gray Thomasomys is Least Concern.

Taxonomic Classification

Rank	Canadian beaver	Olive-gray Thomasomys
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Rodentia (Rodents)	Rodentia (Rodents)
Family	Castoridae (Beavers)	Cricetidae
Genus	Castor (Beavers)	Thomasomys
Species	Castor canadensis	Thomasomys cinereus

Evolutionary Relationship

Canadian beaver and Olive-gray Thomasomys share a common ancestor at the Order level: Rodentia. (Rodents)

Conservation Status

Canadian beaver

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Olive-gray Thomasomys

LC — Least Concern

Physical Characteristics

Attribute	Canadian beaver	Olive-gray Thomasomys
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).

Olive-gray Thomasomys

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

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.