Brathay fern vs Polar bear

Dryopteris brathaica compared with Ursus maritimus

Key Differences

• Brathay fern is Extinct while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Brathay fern	Polar bear
Kingdom	Plantae (植物)	Animalia (動物)
Phylum	Tracheophyta	Chordata (脊索動物)
Class	Polypodiopsida (ウラボシ綱)	Mammalia (哺乳類)
Order	Polypodiales (ウラボシ目)	Carnivora (ネコ目)
Family	Dryopteridaceae	Ursidae (Bears)
Genus	Dryopteris	Ursus (Bears)
Species	Dryopteris brathaica	Ursus maritimus

Conservation Status

Brathay fern

EX — Extinct

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Brathay fern

Habitat

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

Range

Found in Canada.

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.

Brathay fern

The Brathay fern (Dryopteris brathaica) is a species in the genus Dryopteris. It is currently classified as Extinct on the IUCN Red List. Typically found in moist, shaded forest floors and tropical canopies.

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。