European otter vs Prototype quillwort

Lutra lutra compared with Isoetes prototypus

Key Differences

• European otter is Vulnerable while Prototype quillwort is Near Threatened.

Taxonomic Classification

Rank	European otter	Prototype quillwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Tracheophyta
Class	Mammalia (Mammals)	Lycopodiopsida (Lycopodiopsida)
Order	Carnivora (Carnivorans)	Isoetales (Isoetales)
Family	Mustelidae (Weasels & Otters)	Isoetaceae
Genus	Lutra (Otters)	Isoetes
Species	Lutra lutra	Isoetes prototypus

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Prototype quillwort

NT — Near Threatened

Physical Characteristics

Attribute	European otter	Prototype quillwort
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.

Prototype quillwort

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in Canada. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.