brown bear vs Pacific Spiny-rat

Ursus arctos compared with Proechimys decumanus

Key Differences

brown bear is Extinct while Pacific Spiny-rat is Near Threatened.

Taxonomic Classification

Rank	brown bear	Pacific Spiny-rat
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	Carnivora (ネコ目)	Rodentia (ネズミ目)
Family	Ursidae (Bears)	Echimyidae
Genus	Ursus (Bears)	Proechimys
Species	Ursus arctos	Proechimys decumanus

Evolutionary Relationship

brown bear and Pacific Spiny-rat share a common ancestor at the Class level: Mammalia. (哺乳類)

表示 Class: Mammalia

Conservation Status

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

Pacific Spiny-rat

NT — Near Threatened

Physical Characteristics

Attribute	brown bear	Pacific Spiny-rat
Diet	Omnivore	—
Average Lifespan	25 years	—
Average Length	2.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

Pacific Spiny-rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

brown bear

世界で最も広く分布するクマ科の種であるヒグマ（Ursus arctos）は、北アメリカとヨーロッパからロシアを経て日本まで、森林、ツンドラ、高山草原を占有します。成体はアラスカの沿岸個体群では最大700kgまで体重が増えることがあります。果物、根、魚、腐肉を食べる雑食動物で、ヒグマは景観全体に栄養素を分配するキーストーン種です。ほとんどの個体群は安定していますが、一部の亜種は脅威にさらされています。