Koala vs Smoky Oldfield Mouse

Phascolarctos cinereus compared with Thomasomys fumeus

Key Differences

• Koala is Vulnerable while Smoky Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Koala	Smoky Oldfield Mouse
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order	Diprotodontia (Marsupials)	Rodentia (Nagetiere)
Family	Phascolarctidae (Koalas)	Cricetidae
Genus	Phascolarctos (Koalas)	Thomasomys
Species	Phascolarctos cinereus	Thomasomys fumeus

Evolutionary Relationship

Koala and Smoky Oldfield Mouse share a common ancestor at the Class level: Mammalia. (Säugetiere)

Conservation Status

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Smoky Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Koala	Smoky Oldfield Mouse
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	75 cm	—
Average Weight	10.0 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.

Smoky Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

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.