白头海雕 vs brown bear

Haliaeetus leucocephalus compared with Ursus arctos

Key Differences

• 白头海雕 is Not Evaluated while brown bear is Extinct.
• 白头海雕 is carnivore while brown bear is omnivore.
• brown bear is 60.0x heavier than 白头海雕.
• 白头海雕 lives longer (28 years vs 25 years).

Taxonomic Classification

Rank	白头海雕	brown 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	Aves (鳥綱)	Mammalia (哺乳動物)
Order	Accipitriformes (鷹形目)	Carnivora (食肉目)
Family	Accipitridae (Hawks & Eagles)	Ursidae (Bears)
Genus	Haliaeetus (Sea Eagles)	Ursus (Bears)
Species	Haliaeetus leucocephalus	Ursus arctos

Evolutionary Relationship

白头海雕 and brown bear share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

白头海雕

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

Physical Characteristics

Attribute	白头海雕	brown bear
Diet	Carnivore	Omnivore
Average Lifespan	28 years	25 years
Average Length	90 cm	2.0 m
Average Weight	5.0 kg	300.0 kg

Habitat & Geographic Range

白头海雕

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 10 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (8 countries), North America (United States), and South America (Ecuador).

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

白头海雕

白头海雕是美国国鸟，也是美国生态保护史上的成功案例，曾因滴滴涕（DDT）的广泛使用而濒临灭绝，经保护措施的实施后种群数量已显著恢复。该物种在IUCN红色名录中被评估为无危（LC），以白色头颈和尾羽与深棕色体羽形成的鲜明对比为主要识别特征。它们主要以鱼类为食，也会捕食哺乳动物和腐肉。

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。

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇫🇷 France 🇳🇴 Norway 🇸🇪 Sweden