Australian brake vs Polar bear

Pteris tremula compared with Ursus maritimus

Key Differences

• Australian brake is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Australian brake	Polar bear
Kingdom	Plantae (植物)	Animalia (动物界)
Phylum	Tracheophyta	Chordata (脊索动物门)
Class	Polypodiopsida (水龍骨綱)	Mammalia (哺乳動物)
Order	Polypodiales (水龙骨目)	Carnivora (食肉目)
Family	Pteridaceae	Ursidae (Bears)
Genus	Pteris	Ursus (Bears)
Species	Pteris tremula	Ursus maritimus

Conservation Status

Australian brake

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Australian brake

Habitat

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

Range

Distributed across Portugal, South Africa, Spain, and United States.

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.

Australian brake

The Australian brake (Pteris tremula) is a species in the genus Pteris. Typically found in moist, shaded forest floors and tropical canopies. Pteris tremula contributes to the biodiversity of its native ecosystems.

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。