Atlantic Ancula vs Common Eider

Ancula gibbosa compared with Somateria mollissima

Key Differences

• Atlantic Ancula is Least Concern while Common Eider is Near Threatened.

Taxonomic Classification

Rank	Atlantic Ancula	Common Eider
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Aves (Birds)
Order	Nudibranchia (Nudibranchia)	Anseriformes (Anseriformes)
Family	Goniodorididae	Anatidae
Genus	Ancula	Somateria
Species	Ancula gibbosa	Somateria mollissima

Evolutionary Relationship

Atlantic Ancula and Common Eider share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Atlantic Ancula

LC — Least Concern

Common Eider

NT — Near Threatened

Physical Characteristics

Attribute	Atlantic Ancula	Common Eider
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Ancula

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

Common Eider

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (5 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Atlantic Ancula

The Atlantic Ancula (Ancula gibbosa) is a species in the genus Ancula. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Common Eider

Common Eider (Somateria mollissima) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden