European otter vs Threeleaf Halberd Fern

Lutra lutra compared with Tectaria trifoliata

Key Differences

• European otter is Vulnerable while Threeleaf Halberd Fern is Near Threatened.

Taxonomic Classification

Rank	European otter	Threeleaf Halberd Fern
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Tracheophyta
Class	Mammalia (Mammals)	Polypodiopsida (Polypodiopsida)
Order	Carnivora (Carnivorans)	Polypodiales (Polypodiales)
Family	Mustelidae (Weasels & Otters)	Tectariaceae
Genus	Lutra (Otters)	Tectaria
Species	Lutra lutra	Tectaria trifoliata

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Threeleaf Halberd Fern

NT — Near Threatened

Physical Characteristics

Attribute	European otter	Threeleaf Halberd Fern
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.

Threeleaf Halberd Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Brazil, Colombia, and Cuba. 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.