American Walnut vs European otter

Juglans nigra compared with Lutra lutra

Key Differences

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

Taxonomic Classification

Rank	American Walnut	European otter
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Fagales (Beeches & Oaks)	Carnivora (Carnivorans)
Family	Juglandaceae	Mustelidae (Weasels & Otters)
Genus	Juglans	Lutra (Otters)
Species	Juglans nigra	Lutra lutra

Conservation Status

American Walnut

NE — Not Evaluated

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

American Walnut

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Asia (Armenia), Europe (19 countries), North America (Canada, Mexico, United States), and South America (Brazil).

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 Walnut

The American Walnut (Juglans nigra) is a species in the genus Juglans. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden