European otter vs Septicweed

Lutra lutra compared with Senna occidentalis

Key Differences

• European otter is Vulnerable while Septicweed is Least Concern.

Taxonomic Classification

Rank	European otter	Septicweed
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Carnivora (Carnivorans)	Fabales (Legumes & Allies)
Family	Mustelidae (Weasels & Otters)	Fabaceae
Genus	Lutra (Otters)	Senna
Species	Lutra lutra	Senna occidentalis

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Septicweed

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

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.

Septicweed

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, montane grasslands and shrublands, and deserts and xeric shrublands, among 4 distinct biome types spanning the Afrotropic and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (40 countries), Asia (19 countries), Europe (8 countries), North America (7 countries), Oceania and the Pacific (13 countries), and South America (Brazil, Colombia, Guyana).

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