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 (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Reptilia (爬虫類)
Order	Diprotodontia (カンガルー目)	Testudines (カメ)
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. (脊索動物)

表示 Phylum: Chordata

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

オーストラリア東部・南東部を代表する有袋類で、体重は最大15kgに達し、低カロリーのユーカリの葉食から得るエネルギーを節約するために1日最大22時間を睡眠に費やす。他の哺乳類の多くを死に至らしめる有毒なユーカリ成分を処理するために高度に特化しており、解毒に特別に適応した腸内微生物叢を持つ。クラミジア感染症、生息地の伐採、気候変動により個体数が激減し、2022年に絶滅危惧種に指定された。