Polar bear vs 紫背彩裸鼻雀

Ursus maritimus compared with Iridosornis porphyrocephalus

Key Differences

Polar bear is Vulnerable while 紫背彩裸鼻雀 is Near Threatened.

Taxonomic Classification

Rank	Polar bear	紫背彩裸鼻雀
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)	Thraupidae
Genus	Ursus (Bears)	Iridosornis
Species	Ursus maritimus	Iridosornis porphyrocephalus

Evolutionary Relationship

Polar bear and 紫背彩裸鼻雀 share a common ancestor at the Phylum level: Chordata. (脊索动物门)

查看 Phylum: Chordata

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

紫背彩裸鼻雀

NT — Near Threatened

Physical Characteristics

Attribute	Polar bear	紫背彩裸鼻雀
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.

紫背彩裸鼻雀

Habitat

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

Range

Distributed across Colombia, Ecuador, and Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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。

紫背彩裸鼻雀

紫肩唐纳雀（Iridosornis porphyrocephalus）是深紫蓝色肩背与栗色胁部、黑色脸部和翅膀形成强烈对比的华美安第斯唐纳雀。分布于哥伦比亚和厄瓜多尔海拔1000至2200米的湿润云雾林和林缘。雄鸟在林冠光线下展现出闪亮彩虹般的紫色肩背羽毛。成对或小群活动于林内及林缘，取食果实和昆虫。因哥伦比亚和厄瓜多尔云雾林大量砍伐而被列为易危（VU）。