Koala vs Saltwater Crocodile

Phascolarctos cinereus compared with Crocodylus porosus

Key Differences

• Koala is Vulnerable while Saltwater Crocodile is Least Concern.
• Koala is herbivore while Saltwater Crocodile is carnivore.
• Saltwater Crocodile is 100.0x heavier than Koala.
• Saltwater Crocodile lives longer (70 years vs 15 years).

Taxonomic Classification

Rank	Koala	Saltwater Crocodile
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Mammalia (Säugetiere)	Reptilia (Reptilien)
Order	Diprotodontia (Marsupials)	Crocodylia (Crocodilians)
Family	Phascolarctidae (Koalas)	Crocodylidae (Crocodiles)
Genus	Phascolarctos (Koalas)	Crocodylus (True Crocodiles)
Species	Phascolarctos cinereus	Crocodylus porosus

Evolutionary Relationship

Koala and Saltwater Crocodile share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Saltwater Crocodile

LC — Least Concern

Population: ~300.0K

Trend: Stable →

Physical Characteristics

Attribute	Koala	Saltwater Crocodile
Diet	Herbivore	Carnivore
Average Lifespan	15 years	70 years
Average Length	75 cm	6.0 m
Average Weight	10.0 kg	1.0 t

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.

Saltwater Crocodile

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Distributed across Australia, India, Indonesia, Malaysia, and Philippines.

Koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.

Saltwater Crocodile

The saltwater crocodile is the largest living reptile, found from eastern India to northern Australia.

Shared Countries

Both species can be found in 1 countries:

🇦🇺 Australia