コブハクチョウ vs Polar bear

Cygnus olor compared with Ursus maritimus

Key Differences

コブハクチョウ is Near Threatened while Polar bear is Vulnerable.
コブハクチョウ is herbivore while Polar bear is carnivore.
Polar bear is 37.5x heavier than コブハクチョウ.
Polar bear lives longer (25 years vs 20 years).

Taxonomic Classification

Rank	コブハクチョウ	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Aves (鳥類)	Mammalia (哺乳類)
Order	Anseriformes (カモ目)	Carnivora (ネコ目)
Family	Anatidae	Ursidae (Bears)
Genus	Cygnus	Ursus (Bears)
Species	Cygnus olor	Ursus maritimus

Evolutionary Relationship

コブハクチョウ and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索動物)

表示 Phylum: Chordata

Conservation Status

コブハクチョウ

NT — Near Threatened

Population: ~600.0K

Trend: Increasing ↑

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	コブハクチョウ	Polar bear
Diet	Herbivore	Carnivore
Average Lifespan	20 years	25 years
Average Length	1.5 m	2.4 m
Average Weight	12.0 kg	450.0 kg

Habitat & Geographic Range

コブハクチョウ

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests, among 8 distinct biome types.

Range

Widely distributed across Africa (South Africa), Asia (4 countries), Europe (24 countries), North America (Canada, Dominican Republic, United States), Oceania and the Pacific (New Zealand), and South America (Colombia, Peru). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

コブハクチョウ

世界で最もよく見られる白鳥であり最大の飛行鳥の一つで、コブハクチョウ（Cygnus olor）は最大 15 kg に達し、ヨーロッパとアジア全域の湖、川、沿岸湾に生息し、北アメリカとオーストラリアにも広く移入個体群があります。名前に反して、コブハクチョウはシューという音、うなり声、翅の風切り音など様々な音を出します。雄は縄張りを激しく防衛し、強力な翅の一撃で人間を傷つけたり犬を溺死させたりする能力があります。

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。