ナガスクジラ vs Amerika-aka-ei

Balaenoptera physalus compared with Hypanus americanus

Key Differences

• ナガスクジラ is Endangered while Amerika-aka-ei is Near Threatened.

Taxonomic Classification

Rank	ナガスクジラ	Amerika-aka-ei
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Myliobatiformes (トビエイ目)
Family	Balaenopteridae (Rorquals)	Dasyatidae
Genus	Balaenoptera (Rorquals)	Hypanus
Species	Balaenoptera physalus	Hypanus americanus

Evolutionary Relationship

ナガスクジラ and Amerika-aka-ei share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

ナガスクジラ

EN — Endangered

Amerika-aka-ei

NT — Near Threatened

Physical Characteristics

Attribute	ナガスクジラ	Amerika-aka-ei
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.

Amerika-aka-ei

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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。

Shared Countries

Both species can be found in 1 countries:

🇻🇪 Venezuela