Common Periwinkle vs European otter

Littorina littorea compared with Lutra lutra

Key Differences

• Common Periwinkle is Least Concern while European otter is Vulnerable.

Taxonomic Classification

Rank	Common Periwinkle	European otter
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum	Mollusca (Yumuşakçalar)	Chordata (Kordalılar)
Class	Gastropoda (Karından bacaklılar)	Mammalia (memeliler)
Order	Littorinimorpha (Littorinimorpha)	Carnivora (etçiller)
Family	Littorinidae	Mustelidae (Weasels & Otters)
Genus	Littorina	Lutra (Otters)
Species	Littorina littorea	Lutra lutra

Evolutionary Relationship

Common Periwinkle and European otter share a common ancestor at the Kingdom level: Animalia. (hayvan)

Conservation Status

Common Periwinkle

LC — Least Concern

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Common Periwinkle

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found across Europe (4 countries) and North America (Canada, United States).

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.

Common Periwinkle

Common Periwinkle (Littorina littorea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

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