European otter vs speckled rustwort

Lutra lutra compared with Marsupella sphacelata

Key Differences

European otter is Vulnerable while speckled rustwort is Least Concern.

Taxonomic Classification

Rank	European otter	speckled rustwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Marchantiophyta (liverwort)
Class	Mammalia (Mammals)	Jungermanniopsida (Jungermanniopsida)
Order	Carnivora (Carnivorans)	Jungermanniales (Jungermanniales)
Family	Mustelidae (Weasels & Otters)	Gymnomitriaceae
Genus	Lutra (Otters)	Marsupella
Species	Lutra lutra	Marsupella sphacelata

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

speckled rustwort

LC — Least Concern

Physical Characteristics

Attribute	European otter	speckled rustwort
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.

speckled rustwort

Habitat

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

Range

Distributed across Norway, Portugal, Sweden, and United States.

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.