Bitter Webcap vs European otter

Cortinarius infractus compared with Lutra lutra

Key Differences

Bitter Webcap is Least Concern while European otter is Vulnerable.

Taxonomic Classification

Rank	Bitter Webcap	European otter
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (Mammals)
Order	Agaricales (Gilled Mushrooms)	Carnivora (Carnivorans)
Family	Cortinariaceae	Mustelidae (Weasels & Otters)
Genus	Cortinarius	Lutra (Otters)
Species	Cortinarius infractus	Lutra lutra

Conservation Status

Bitter Webcap

LC — Least Concern

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Bitter Webcap

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark and Sweden.

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.

Bitter Webcap

The Bitter Webcap (Cortinarius infractus) is a species in the genus Cortinarius. It is currently classified as Least Concern on the IUCN Red List. Typically found in forest floors, decomposing wood, and soil ecosystems.

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.