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 (动物界)
Phylum	Tracheophyta	Chordata (脊索动物门)
Class	Polypodiopsida (水龍骨綱)	Mammalia (哺乳動物)
Order	Cyatheales (桫椤目)	Carnivora (食肉目)
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

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。