brown bear vs Polar bear

Ursus arctos compared with Ursus maritimus

Key Differences

• brown bear is Extinct while Polar bear is Vulnerable.
• brown bear is omnivore while Polar bear is carnivore.

Taxonomic Classification

Rank	brown bear	Polar bear
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order same	Carnivora (食肉目)	Carnivora (食肉目)
Family same	Ursidae (Bears)	Ursidae (Bears)
Genus same	Ursus (Bears)	Ursus (Bears)
Species	Ursus arctos	Ursus maritimus

Evolutionary Relationship

brown bear and Polar bear share a common ancestor at the Genus level: Ursus. (Bears)

Conservation Status

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	brown bear	Polar bear
Diet	Omnivore	Carnivore
Average Lifespan	25 years	25 years
Average Length	2.0 m	2.4 m
Average Weight	300.0 kg	450.0 kg

Habitat & Geographic Range

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

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.

brown bear

棕熊是世界上分布最广泛的熊类物种，从北美和欧洲横跨俄罗斯至日本，占据森林、冻原和高山草甸。阿拉斯加沿海种群的成年个体体重可达700公斤。棕熊是杂食性动物，以浆果、根茎、鱼类和腐肉为食，是跨景观分配养分的关键物种。大多数种群稳定，但部分亚种受到威胁。

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway