Polar bear vs Twilight Darner

Ursus maritimus compared with Gynacantha nervosa

Key Differences

• Polar bear is Vulnerable while Twilight Darner is Least Concern.

Taxonomic Classification

Rank	Polar bear	Twilight Darner
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Arthropoda (節足動物)
Class	Mammalia (哺乳類)	Insecta (昆虫)
Order	Carnivora (ネコ目)	Odonata (蜻蛉目)
Family	Ursidae (Bears)	Aeshnidae
Genus	Ursus (Bears)	Gynacantha
Species	Ursus maritimus	Gynacantha nervosa

Evolutionary Relationship

Polar bear and Twilight Darner share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Twilight Darner

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Twilight Darner
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

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.

Twilight Darner

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in Colombia.

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。