Polar bear vs Pygmy short-tailed opossum

Ursus maritimus compared with Monodelphis kunsi

Key Differences

• Polar bear is Vulnerable while Pygmy short-tailed opossum is Least Concern.

Taxonomic Classification

Rank	Polar bear	Pygmy short-tailed opossum
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class same	Mammalia (lớp Thú)	Mammalia (lớp Thú)
Order	Carnivora (bộ Ăn thịt)	Didelphimorphia (Didelphimorphia)
Family	Ursidae (Bears)	Didelphidae
Genus	Ursus (Bears)	Monodelphis
Species	Ursus maritimus	Monodelphis kunsi

Evolutionary Relationship

Polar bear and Pygmy short-tailed opossum share a common ancestor at the Class level: Mammalia. (lớp Thú)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Pygmy short-tailed opossum

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Pygmy short-tailed opossum
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.

Pygmy short-tailed opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.