brown bear vs koala

Ursus arctos compared with Phascolarctos cinereus

Key Differences

• brown bear is Extinct while koala is Vulnerable.
• brown bear is omnivore while koala is herbivore.
• brown bear is 30.0x heavier than koala.
• brown bear lives longer (25 years vs 15 years).

Taxonomic Classification

Rank	brown bear	koala
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Carnivora (食肉目)	Diprotodontia (雙門齒目)
Family	Ursidae (Bears)	Phascolarctidae (Koalas)
Genus	Ursus (Bears)	Phascolarctos (Koalas)
Species	Ursus arctos	Phascolarctos cinereus

Evolutionary Relationship

brown bear and koala share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	brown bear	koala
Diet	Omnivore	Herbivore
Average Lifespan	25 years	15 years
Average Length	2.0 m	75 cm
Average Weight	300.0 kg	10.0 kg

Habitat & Geographic Range

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found in Australia. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

brown bear

棕熊是世界上分布最广泛的熊类物种，从北美和欧洲横跨俄罗斯至日本，占据森林、冻原和高山草甸。阿拉斯加沿海种群的成年个体体重可达700公斤。棕熊是杂食性动物，以浆果、根茎、鱼类和腐肉为食，是跨景观分配养分的关键物种。大多数种群稳定，但部分亚种受到威胁。

koala

澳大利亚东部和东南部的标志性有袋类动物，体重最大可达15千克，为了节省低热量桉树叶食物所提供的能量，每天最多睡眠22小时。高度特化，能够处理会致大多数其他哺乳动物死亡的有毒桉树成分，拥有专门适应解毒功能的肠道微生物群。因衣原体病、栖息地开发和气候变化导致种群锐减，2022年被列为濒危物种。