Amazonian Marsh Rat vs koala

Holochilus sciureus compared with Phascolarctos cinereus

Key Differences

Amazonian Marsh Rat is Least Concern while koala is Vulnerable.

Taxonomic Classification

Rank	Amazonian Marsh Rat	koala
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Diprotodontia (Marsupials)
Family	Cricetidae	Phascolarctidae (Koalas)
Genus	Holochilus	Phascolarctos (Koalas)
Species	Holochilus sciureus	Phascolarctos cinereus

Evolutionary Relationship

Amazonian Marsh Rat and koala share a common ancestor at the Class level: Mammalia. (Mammals)

View Class: Mammalia

Conservation Status

Amazonian Marsh Rat

LC — Least Concern

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Amazonian Marsh Rat	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Amazonian Marsh Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

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.

Amazonian Marsh Rat

The Amazonian Marsh Rat (Holochilus sciureus) is a species in the genus Holochilus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.