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 (พืช)	Animalia (สัตว์)
Phylum	Tracheophyta	Chordata (สัตว์มีแกนสันหลัง)
Class	Polypodiopsida (Polypodiopsida)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Polypodiales (Polypodiales)	Carnivora (สัตว์กินเนื้อ)
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

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.