Polar bear vs Spineless Acaena

Ursus maritimus compared with Acaena inermis

Key Differences

• Polar bear is Vulnerable while Spineless Acaena is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	Spineless Acaena
Kingdom	Animalia (động vật)	Plantae (thực vật)
Phylum	Chordata (động vật có dây sống)	Magnoliophyta (Flowering Plants)
Class	Mammalia (lớp Thú)	Magnoliopsida (Dicots)
Order	Carnivora (bộ Ăn thịt)	Rosales (bộ Hoa hồng)
Family	Ursidae (Bears)	Rosaceae (Rose Family)
Genus	Ursus (Bears)	Acaena
Species	Ursus maritimus	Acaena inermis

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Spineless Acaena

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

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.

Spineless Acaena

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Austria, Belgium, France, Netherlands, and United Kingdom.

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.