Polar bear vs Willow Rose Gall Midge

Ursus maritimus compared with Rabdophaga rosaria

Key Differences

Polar bear is Vulnerable while Willow Rose Gall Midge is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	Willow Rose Gall Midge
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)	Diptera (ハエ目)
Family	Ursidae (Bears)	Cecidomyiidae
Genus	Ursus (Bears)	Rabdophaga
Species	Ursus maritimus	Rabdophaga rosaria

Evolutionary Relationship

Polar bear and Willow Rose Gall Midge share a common ancestor at the Kingdom level: Animalia. (動物)

表示 Kingdom: Animalia

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Willow Rose Gall Midge

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	Willow Rose Gall Midge
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.

Willow Rose Gall Midge

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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。