Polar bear vs 斑文鳥〔斑胸文鳥〕

Ursus maritimus compared with Lonchura punctulata

Key Differences

• Polar bear is Vulnerable while 斑文鳥〔斑胸文鳥〕 is Least Concern.

Taxonomic Classification

Rank	Polar bear	斑文鳥〔斑胸文鳥〕
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 punctulata

Evolutionary Relationship

Polar bear and 斑文鳥〔斑胸文鳥〕 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 ↓

斑文鳥〔斑胸文鳥〕

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	斑文鳥〔斑胸文鳥〕
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.

斑文鳥〔斑胸文鳥〕

Habitat

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

Range

Widely distributed across Asia (5 countries), Europe (6 countries), North America (6 countries), and Oceania and the Pacific (Australia).

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。

斑文鳥〔斑胸文鳥〕

斑文鸟(Lonchura punctulata)是亚洲分布最广的梅花雀科鸟类之一，因胸部棕白相间的鱼鳞状斑纹而得名。分布于从印度向东经东南亚至菲律宾和印度尼西亚的草地、稻田和灌丛，并在夏威夷、佛罗里达和澳大利亚等世界多地建立了野化种群。群居性极强，常组成数百只的觅食群，取食草种子和谷粒。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway