ナガスクジラ vs roker

Balaenoptera physalus compared with Raja clavata

Key Differences

• ナガスクジラ is Endangered while roker is Near Threatened.

Taxonomic Classification

Rank	ナガスクジラ	roker
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)	Rajiformes (ガンギエイ目)
Family	Balaenopteridae (Rorquals)	Rajidae
Genus	Balaenoptera (Rorquals)	Raja
Species	Balaenoptera physalus	Raja clavata

Evolutionary Relationship

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

Conservation Status

ナガスクジラ

EN — Endangered

roker

NT — Near Threatened

Physical Characteristics

Attribute	ナガスクジラ	roker
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.

roker

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. 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 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden