Polar bear vs Water fern

Ursus maritimus compared with Azolla filiculoides

Key Differences

Polar bear is Vulnerable while Water fern is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	Water fern
Kingdom	Animalia (動物)	Plantae (植物)
Phylum	Chordata (脊索動物)	Tracheophyta
Class	Mammalia (哺乳類)	Polypodiopsida (ウラボシ綱)
Order	Carnivora (ネコ目)	Salviniales (水生シダ類)
Family	Ursidae (Bears)	Salviniaceae
Genus	Ursus (Bears)	Azolla
Species	Ursus maritimus	Azolla filiculoides

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Water fern

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	Water fern
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.

Water fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Widely distributed across Africa (18 countries), Asia (9 countries), Europe (27 countries), North America (4 countries), and South America (Brazil, Colombia).

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。