Common Periwinkle vs Harmless Serotine

Littorina littorea compared with Eptesicus innoxius

Key Differences

• Common Periwinkle is Least Concern while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	Common Periwinkle	Harmless Serotine
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Mammalia (Mammals)
Order	Littorinimorpha (Littorinimorpha)	Chiroptera (Bats)
Family	Littorinidae	Vespertilionidae
Genus	Littorina	Eptesicus
Species	Littorina littorea	Eptesicus innoxius

Evolutionary Relationship

Common Periwinkle and Harmless Serotine share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Common Periwinkle

LC — Least Concern

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	Common Periwinkle	Harmless Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

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).

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

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.