European otter vs Polar bear

Lutra lutra compared with Ursus maritimus

Key Differences

Polar bear is 45.0x heavier than European otter.
Polar bear lives longer (25 years vs 10 years).

Taxonomic Classification

Rank	European otter	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	Mustelidae (Weasels & Otters)	Ursidae (Bears)
Genus	Lutra (Otters)	Ursus (Bears)
Species	Lutra lutra	Ursus maritimus

Evolutionary Relationship

European otter and Polar bear share a common ancestor at the Order level: Carnivora. (食肉目)

查看 Order: Carnivora

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	European otter	Polar bear
Diet	Carnivore	Carnivore
Average Lifespan	10 years	25 years
Average Length	1.0 m	2.4 m
Average Weight	10.0 kg	450.0 kg

Habitat & Geographic Range

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its 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.

European otter

欧洲水獭（Lutra lutra）是一种纤细的半水生鼬科动物，分布于欧洲和亚洲的清洁河流、溪流和海岸线。欧洲水獭体长可达1.3米，是技术娴熟的捕鱼者，利用敏感的胡须探测猎物的动向。它们需要鱼类丰富的清洁水域，是淡水生态系统健康状况的指示物种。曾因狩猎和污染在西欧几近灭绝，随着水质改善，种群数量已显著恢复。