ナガスクジラ vs Irrawaddy dolphin

Balaenoptera physalus compared with Orcaella brevirostris

Taxonomic Classification

Rank	ナガスクジラ	Irrawaddy dolphin
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order same	Cetacea (Whales & Dolphins)	Cetacea (Whales & Dolphins)
Family	Balaenopteridae (Rorquals)	Delphinidae (Oceanic Dolphins)
Genus	Balaenoptera (Rorquals)	Orcaella
Species	Balaenoptera physalus	Orcaella brevirostris

Evolutionary Relationship

ナガスクジラ and Irrawaddy dolphin share a common ancestor at the Order level: Cetacea. (Whales & Dolphins)

Conservation Status

ナガスクジラ

EN — Endangered

Irrawaddy dolphin

EN — Endangered

Physical Characteristics

Attribute	ナガスクジラ	Irrawaddy dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

ナガスクジラ

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), 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.

ナガスクジラ

ナガスクジラ（Balaenoptera physalus）は、IUCNレッドリストで絶滅危惧種（EN）に分類されています。野生での絶滅リスクが高く、個体数の著しい減少と生存への継続的な脅威に直面しています。