American bison vs European otter

Bison bison compared with Lutra lutra

Key Differences

• American bison is Not Evaluated while European otter is Vulnerable.

Taxonomic Classification

Rank	American bison	European otter
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Artiodactyla (อันดับสัตว์กีบคู่)	Carnivora (สัตว์กินเนื้อ)
Family	Bovidae (Bovids)	Mustelidae (Weasels & Otters)
Genus	Bison	Lutra (Otters)
Species	Bison bison	Lutra lutra

Evolutionary Relationship

American bison and European otter share a common ancestor at the Class level: Mammalia. (สัตว์เลี้ยงลูกด้วยน้ำนม)

Conservation Status

American bison

NE — Not Evaluated

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	American bison	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

American bison

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Colombia).

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

American bison

The American bison (Bison bison) is a species in the genus Bison. Typically found in diverse terrestrial and aquatic ecosystems.

European otter

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.

Shared Countries

Both species can be found in 3 countries:

🇳🇴 Norway 🇷🇺 Russia 🇸🇪 Sweden