Brazilian Gracile Opossum vs Polar bear

Gracilinanus microtarsus compared with Ursus maritimus

Key Differences

• Brazilian Gracile Opossum is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Brazilian Gracile Opossum	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Didelphimorphia (Didelphimorphia)	Carnivora (ネコ目)
Family	Didelphidae	Ursidae (Bears)
Genus	Gracilinanus	Ursus (Bears)
Species	Gracilinanus microtarsus	Ursus maritimus

Evolutionary Relationship

Brazilian Gracile Opossum and Polar bear share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Brazilian Gracile Opossum

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brazilian Gracile Opossum	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Brazilian Gracile Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Brazilian Gracile Opossum

The Brazilian Gracile Opossum (Gracilinanus microtarsus) is a species in the genus Gracilinanus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic 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。