Big-eared opossum vs Речная крачка

Didelphis aurita compared with Sterna hirundo

Key Differences

• Big-eared opossum is Least Concern while Речная крачка is Endangered.

Taxonomic Classification

Rank	Big-eared opossum	Речная крачка
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class	Mammalia (млекопитающие)	Aves (птицы)
Order	Didelphimorphia (Опоссумы)	Charadriiformes (ржанкообразные)
Family	Didelphidae	Laridae
Genus	Didelphis	Sterna
Species	Didelphis aurita	Sterna hirundo

Evolutionary Relationship

Big-eared opossum and Речная крачка share a common ancestor at the Phylum level: Chordata. (хордовые)

Conservation Status

Big-eared opossum

LC — Least Concern

Речная крачка

EN — Endangered

Physical Characteristics

Attribute	Big-eared opossum	Речная крачка
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big-eared opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Речная крачка

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.

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.

Речная крачка

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.