アジサシ vs Irrawaddy dolphin

Sterna hirundo compared with Orcaella brevirostris

Taxonomic Classification

Rank	アジサシ	Irrawaddy dolphin
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Aves (鳥類)	Mammalia (哺乳類)
Order	Charadriiformes (チドリ目)	Cetacea (Whales & Dolphins)
Family	Laridae	Delphinidae (Oceanic Dolphins)
Genus	Sterna	Orcaella
Species	Sterna hirundo	Orcaella brevirostris

Evolutionary Relationship

アジサシ and Irrawaddy dolphin share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

アジサシ

EN — Endangered

Irrawaddy dolphin

EN — Endangered

Physical Characteristics

Attribute	アジサシ	Irrawaddy dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

アジサシ

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.

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

アジサシ

アジサシ（Sterna hirundo）はIUCNレッドリストで危機（EN）に分類されている。野生での絶滅リスクが高く、著しい個体数の減少と生存への継続的な脅威がある。