Australian treefern vs Polar bear

Dicksonia antarctica compared with Ursus maritimus

Key Differences

Australian treefern is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Australian treefern	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	Cyatheales (ヘゴ目)	Carnivora (ネコ目)
Family	Dicksoniaceae	Ursidae (Bears)
Genus	Dicksonia	Ursus (Bears)
Species	Dicksonia antarctica	Ursus maritimus

Conservation Status

Australian treefern

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Australian treefern

Habitat

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

Range

Distributed across Ireland, Portugal, and United Kingdom.

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 treefern

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

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。