ハクトウワシ vs Polar bear
Haliaeetus leucocephalus compared with Ursus maritimus
Key Differences
- ハクトウワシ is Not Evaluated while Polar bear is Vulnerable.
- Polar bear is 90.0x heavier than ハクトウワシ.
- ハクトウワシ lives longer (28 years vs 25 years).
Taxonomic Classification
| Rank | ハクトウワシ | 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 | Accipitriformes (タカ目) | Carnivora (ネコ目) |
| Family | Accipitridae (Hawks & Eagles) | Ursidae (Bears) |
| Genus | Haliaeetus (Sea Eagles) | Ursus (Bears) |
| Species | Haliaeetus leucocephalus | Ursus maritimus |
Evolutionary Relationship
ハクトウワシ and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索動物)
Conservation Status
ハクトウワシ
NE — Not EvaluatedPopulation: ~316.7K
Trend: Increasing ↑
Polar bear
VU — VulnerablePopulation: ~26.0K
Trend: Decreasing ↓
Physical Characteristics
| Attribute | ハクトウワシ | Polar bear |
|---|---|---|
| Diet | Carnivore | Carnivore |
| Average Lifespan | 28 years | 25 years |
| Average Length | 90 cm | 2.4 m |
| Average Weight | 5.0 kg | 450.0 kg |
Habitat & Geographic Range
ハクトウワシ
Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 10 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.
Widely distributed across Europe (8 countries), North America (United States), and South America (Ecuador).
Polar bear
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.
Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.
ハクトウワシ
アメリカの国鳥であり保全の成功を象徴するハクトウワシは翼開長が最大2.4 mに達し、北米全域の水辺近くの森林や湿地に生息する。強力な空中捕食者兼腐肉食者で魚を主食とするが、水鳥や腐肉も捕食する。DDT汚染と狩猟によって1960年代にほぼ絶滅に瀕したが、農薬の使用禁止と絶滅危惧種法の施行により劇的に回復した。
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。
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