koala vs Leatherback Sea Turtle

Phascolarctos cinereus compared with Dermochelys coriacea

Key Differences

• koala is herbivore while Leatherback Sea Turtle is carnivore.
• Leatherback Sea Turtle is 50.0x heavier than koala.
• Leatherback Sea Turtle lives longer (50 years vs 15 years).

Taxonomic Classification

Rank	koala	Leatherback Sea Turtle
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	Mammalia (哺乳動物)	Reptilia (爬行纲)
Order	Diprotodontia (雙門齒目)	Testudines (龟鳖目)
Family	Phascolarctidae (Koalas)	Cheloniidae (Sea Turtles)
Genus	Phascolarctos (Koalas)	Chelonia (Green Sea Turtles)
Species	Phascolarctos cinereus	Dermochelys coriacea

Evolutionary Relationship

koala and Leatherback Sea Turtle share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	koala	Leatherback Sea Turtle
Diet	Herbivore	Carnivore
Average Lifespan	15 years	50 years
Average Length	75 cm	2.0 m
Average Weight	10.0 kg	500.0 kg

Habitat & Geographic 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.

Leatherback Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 5 distinct biome types spanning the Australasia and Indomalayan and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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。

Leatherback Sea Turtle

棱皮龟是现存最大的龟类，也是第四重的爬行动物。与其他龟类不同，它没有坚硬的甲壳，而是覆有柔软的皮革状皮肤。