European otter vs koala

Lutra lutra compared with Phascolarctos cinereus

Key Differences

• European otter is carnivore while koala is herbivore.
• koala lives longer (15 years vs 10 years).

Taxonomic Classification

Rank	European otter	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	Mustelidae (Weasels & Otters)	Phascolarctidae (Koalas)
Genus	Lutra (Otters)	Phascolarctos (Koalas)
Species	Lutra lutra	Phascolarctos cinereus

Evolutionary Relationship

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

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	European otter	koala
Diet	Carnivore	Herbivore
Average Lifespan	10 years	15 years
Average Length	1.0 m	75 cm
Average Weight	10.0 kg	10.0 kg

Habitat & Geographic Range

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

European otter

欧洲水獭（Lutra lutra）是一种纤细的半水生鼬科动物，分布于欧洲和亚洲的清洁河流、溪流和海岸线。欧洲水獭体长可达1.3米，是技术娴熟的捕鱼者，利用敏感的胡须探测猎物的动向。它们需要鱼类丰富的清洁水域，是淡水生态系统健康状况的指示物种。曾因狩猎和污染在西欧几近灭绝，随着水质改善，种群数量已显著恢复。

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。