Polar bear vs 白头文鸟

Ursus maritimus compared with Lonchura maja

Key Differences

• Polar bear is Vulnerable while 白头文鸟 is Least Concern.

Taxonomic Classification

Rank	Polar bear	白头文鸟
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)	Passeriformes (雀形目)
Family	Ursidae (Bears)	Estrildidae
Genus	Ursus (Bears)	Lonchura
Species	Ursus maritimus	Lonchura maja

Evolutionary Relationship

Polar bear and 白头文鸟 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 ↓

白头文鸟

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	白头文鸟
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.

白头文鸟

Habitat

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

Range

Found across Asia (Japan, Taiwan, United Arab Emirates) and Europe (6 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。

白头文鸟

白头文鸟（Lonchura maja）是一种具有独特白色头部和栗色胁部的中型群居梅花雀，分布于从泰国至菲律宾的东南亚森林、次生林和稻田。高度合群，常聚集成大群觅食草种和稻谷。白色头部与深褐色体羽形成鲜明对比，是视觉上最具特色的文鸟之一。在亚洲是深受喜爱的笼养鸟，人工饲养下繁殖较为容易。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway