云雀 vs Polar bear

Alauda arvensis compared with Ursus maritimus

Taxonomic Classification

Rank	云雀	Polar 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	Passeriformes (雀形目)	Carnivora (食肉目)
Family	Alaudidae	Ursidae (Bears)
Genus	Alauda	Ursus (Bears)
Species	Alauda arvensis	Ursus maritimus

Evolutionary Relationship

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

查看 Phylum: Chordata

Conservation Status

云雀

VU — Vulnerable

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	云雀	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

云雀

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Widely distributed across Europe (5 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, New Zealand). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its 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.

云雀

云雀（Alauda arvensis）以飞行中歌唱的复杂悦耳鸣声在欧洲文学和诗歌中广受赞誉。它们在欧洲和亚洲的开阔农田、草地和荒野上空垂直飞翔数百米，同时发出长达一小时的连续鸣唱。雄鸟可发出700多种独特的鸣唱短句。曾经在欧洲农田中极为丰富的云雀，由于农业集约化，自1970年以来种群数量已下降70%以上。