Braune Nadelschnecke vs Flussseeschwalbe

Acicula fusca compared with Sterna hirundo

Key Differences

• Braune Nadelschnecke is Extinct while Flussseeschwalbe is Endangered.

Taxonomic Classification

Rank	Braune Nadelschnecke	Flussseeschwalbe
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Mollusca (Weichtiere)	Chordata (Chordatiere)
Class	Gastropoda (Schnecken)	Aves (Vögel)
Order	Architaenioglossa (Architaenioglossa)	Charadriiformes (Regenpfeiferartige)
Family	Aciculidae	Laridae
Genus	Acicula	Sterna
Species	Acicula fusca	Sterna hirundo

Evolutionary Relationship

Braune Nadelschnecke and Flussseeschwalbe share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Braune Nadelschnecke

EX — Extinct

Flussseeschwalbe

EN — Endangered

Physical Characteristics

Attribute	Braune Nadelschnecke	Flussseeschwalbe
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Braune Nadelschnecke

Habitat

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

Range

Distributed across Belgium and Norway.

Flussseeschwalbe

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 9 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (7 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Braune Nadelschnecke

The Brown Point Snail (Acicula fusca) is a species in the genus Acicula. It is currently classified as Extinct on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Flussseeschwalbe

Common Tern (Sterna hirundo) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇳🇴 Norway