Polar bear vs 白头硬尾鸭

Ursus maritimus compared with Oxyura leucocephala

Key Differences

• Polar bear is Vulnerable while 白头硬尾鸭 is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	白头硬尾鸭
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	Mammalia (哺乳動物)	Aves (鳥綱)
Order	Carnivora (食肉目)	Anseriformes (雁形目)
Family	Ursidae (Bears)	Anatidae
Genus	Ursus (Bears)	Oxyura
Species	Ursus maritimus	Oxyura leucocephala

Evolutionary Relationship

Polar bear and 白头硬尾鸭 share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

白头硬尾鸭

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	白头硬尾鸭
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.

白头硬尾鸭

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (9 countries).

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。

白头硬尾鸭

白头硬尾鸭（Oxyura leucocephala）被IUCN红色名录列为未评估（NE）。尚未依据IUCN红色名录标准进行评估，保育状况有待确定。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway