Bristly Haircap vs Polar bear

Polytrichum piliferum compared with Ursus maritimus

Key Differences

Bristly Haircap is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Bristly Haircap	Polar bear
Kingdom	Plantae (植物)	Animalia (動物)
Phylum	Bryophyta	Chordata (脊索動物)
Class	Polytrichopsida (Polytrichopsida)	Mammalia (哺乳類)
Order	Polytrichales (Polytrichales)	Carnivora (ネコ目)
Family	Polytrichaceae	Ursidae (Bears)
Genus	Polytrichum	Ursus (Bears)
Species	Polytrichum piliferum	Ursus maritimus

Conservation Status

Bristly Haircap

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Bristly Haircap

Habitat

Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and North America (United States).

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.

Bristly Haircap

The Bristly Haircap (Polytrichum piliferum) is a species in the genus Polytrichum. It is currently classified as Least Concern on the IUCN Red List. Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

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。