Amerikanischer Biber vs Niceforo Maria’s Oldfield Mouse

Castor canadensis compared with Thomasomys nicefori

Key Differences

• Amerikanischer Biber is Not Evaluated while Niceforo Maria’s Oldfield Mouse is Least Concern.

Taxonomic Classification

Rank	Amerikanischer Biber	Niceforo Maria’s Oldfield Mouse
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order same	Rodentia (Nagetiere)	Rodentia (Nagetiere)
Family	Castoridae (Beavers)	Cricetidae
Genus	Castor (Beavers)	Thomasomys
Species	Castor canadensis	Thomasomys nicefori

Evolutionary Relationship

Amerikanischer Biber and Niceforo Maria’s Oldfield Mouse share a common ancestor at the Order level: Rodentia. (Nagetiere)

Conservation Status

Amerikanischer Biber

NE — Not Evaluated

Population: ~15.0M

Trend: Stable →

Niceforo Maria’s Oldfield Mouse

LC — Least Concern

Physical Characteristics

Attribute	Amerikanischer Biber	Niceforo Maria’s Oldfield Mouse
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	1.0 m	—
Average Weight	25.0 kg	—

Habitat & Geographic Range

Amerikanischer Biber

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).

Niceforo Maria’s Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Amerikanischer Biber

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.