Brathay fern vs Oso Polar

Dryopteris brathaica compared with Ursus maritimus

Key Differences

Brathay fern is Extinct while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Brathay fern	Oso Polar
Kingdom	Plantae (planta)	Animalia (Animals)
Phylum	Tracheophyta	Chordata (cordados)
Class	Polypodiopsida (Polypodiopsida)	Mammalia (mamíferos)
Order	Polypodiales (Polypodiales)	Carnivora (carnívoros)
Family	Dryopteridaceae	Ursidae (Bears)
Genus	Dryopteris	Ursus (Bears)
Species	Dryopteris brathaica	Ursus maritimus

Conservation Status

Brathay fern

EX — Extinct

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brathay fern	Oso Polar
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.

Oso Polar

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.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.