Big-eared opossum vs Common Eider

Didelphis aurita compared with Somateria mollissima

Key Differences

• Big-eared opossum is Least Concern while Common Eider is Near Threatened.

Taxonomic Classification

Rank	Big-eared opossum	Common Eider
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Didelphimorphia (Didelphimorphia)	Anseriformes (Anseriformes)
Family	Didelphidae	Anatidae
Genus	Didelphis	Somateria
Species	Didelphis aurita	Somateria mollissima

Evolutionary Relationship

Big-eared opossum and Common Eider share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big-eared opossum

LC — Least Concern

Common Eider

NT — Near Threatened

Physical Characteristics

Attribute	Big-eared opossum	Common Eider
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big-eared opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Big-eared opossum

The Big-eared opossum (Didelphis aurita) is a species in the genus Didelphis. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.