koala vs Willow Pigmy

Phascolarctos cinereus compared with Stigmella obliquella

Key Differences

• koala is Vulnerable while Willow Pigmy is Least Concern.

Taxonomic Classification

Rank	koala	Willow Pigmy
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Diprotodontia (Marsupials)	Lepidoptera (Butterflies & Moths)
Family	Phascolarctidae (Koalas)	Nepticulidae
Genus	Phascolarctos (Koalas)	Stigmella
Species	Phascolarctos cinereus	Stigmella obliquella

Evolutionary Relationship

koala and Willow Pigmy share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Willow Pigmy

LC — Least Concern

Physical Characteristics

Attribute	koala	Willow Pigmy
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.

Willow Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.