Australian butterfly ray vs Polar bear

Gymnura australis compared with Ursus maritimus

Key Differences

• Australian butterfly ray is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Australian butterfly ray	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Elasmobranchii	Mammalia (哺乳類)
Order	Myliobatiformes (トビエイ目)	Carnivora (ネコ目)
Family	Gymnuridae	Ursidae (Bears)
Genus	Gymnura	Ursus (Bears)
Species	Gymnura australis	Ursus maritimus

Evolutionary Relationship

Australian butterfly ray and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Australian butterfly ray

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Australian butterfly ray	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Australian butterfly ray

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Australian butterfly ray

The Australian butterfly ray (Gymnura australis) is a species in the genus Gymnura. It is currently classified as Least Concern on the IUCN Red List. Gymnura australis contributes to the biodiversity of its native ecosystems.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。