Polar bear vs Sowerby's keeled slug

Ursus maritimus compared with Tandonia sowerbyi

Key Differences

• Polar bear is Vulnerable while Sowerby's keeled slug is Data Deficient.

Taxonomic Classification

Rank	Polar bear	Sowerby's keeled slug
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Mammalia (哺乳類)	Gastropoda (腹足綱)
Order	Carnivora (ネコ目)	Stylommatophora (Stylommatophora)
Family	Ursidae (Bears)	Milacidae
Genus	Ursus (Bears)	Tandonia
Species	Ursus maritimus	Tandonia sowerbyi

Evolutionary Relationship

Polar bear and Sowerby's keeled slug share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Sowerby's keeled slug

DD — Data Deficient

Physical Characteristics

Attribute	Polar bear	Sowerby's keeled slug
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.

Sowerby's keeled slug

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found across Europe (10 countries) and Oceania and the Pacific (New Zealand).

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。