koala vs Pygmy three-toed sloth

Phascolarctos cinereus compared with Bradypus pygmaeus

Key Differences

• koala is Vulnerable while Pygmy three-toed sloth is Critically Endangered.

Taxonomic Classification

Rank	koala	Pygmy three-toed sloth
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Diprotodontia (Marsupials)	Pilosa (Sloths & Anteaters)
Family	Phascolarctidae (Koalas)	Bradypodidae (Three-toed Sloths)
Genus	Phascolarctos (Koalas)	Bradypus (Three-toed Sloths)
Species	Phascolarctos cinereus	Bradypus pygmaeus

Evolutionary Relationship

koala and Pygmy three-toed sloth share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Pygmy three-toed sloth

CR — Critically Endangered

Physical Characteristics

Attribute	koala	Pygmy three-toed sloth
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.

Pygmy three-toed sloth

Habitat

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.