Polar bear vs Variable-Leaved Crestwort

Ursus maritimus compared with Lophocolea heterophylla

Key Differences

Polar bear is Vulnerable while Variable-Leaved Crestwort is Least Concern.

Taxonomic Classification

Rank	Polar bear	Variable-Leaved Crestwort
Kingdom	Animalia (動物)	Plantae (植物)
Phylum	Chordata (脊索動物)	Marchantiophyta (苔類)
Class	Mammalia (哺乳類)	Jungermanniopsida (Jungermanniopsida)
Order	Carnivora (ネコ目)	Jungermanniales (ウロコゴケ目)
Family	Ursidae (Bears)	Lophocoleaceae
Genus	Ursus (Bears)	Lophocolea
Species	Ursus maritimus	Lophocolea heterophylla

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Variable-Leaved Crestwort

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Variable-Leaved Crestwort
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic 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.

Variable-Leaved Crestwort

Habitat

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

Range

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

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。