史文森氏夜鶇 vs Polar bear

Catharus ustulatus compared with Ursus maritimus

Key Differences

• 史文森氏夜鶇 is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	史文森氏夜鶇	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	Turdidae	Ursidae (Bears)
Genus	Catharus	Ursus (Bears)
Species	Catharus ustulatus	Ursus maritimus

Evolutionary Relationship

史文森氏夜鶇 and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

史文森氏夜鶇

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	史文森氏夜鶇	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

史文森氏夜鶇

Habitat

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

Range

Widely distributed across Europe (Denmark, Norway, Sweden), North America (United States), and South America (Colombia, Ecuador, Venezuela).

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.

史文森氏夜鶇

Olive-Backed Thrush（Catharus ustulatus，斯氏夜鸫）在IUCN红色名录中被列为无危（LC）。广泛分布于其生存范围内，种群数量丰富且稳定，无直接保育问题。

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。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway