Karoo Hillside Brown vs koala

Stygionympha irrorata compared with Phascolarctos cinereus

Key Differences

• Karoo Hillside Brown is Least Concern while koala is Vulnerable.

Taxonomic Classification

Rank	Karoo Hillside Brown	koala
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Lepidoptera (Butterflies & Moths)	Diprotodontia (Marsupials)
Family	Nymphalidae (Brush-footed Butterflies)	Phascolarctidae (Koalas)
Genus	Stygionympha	Phascolarctos (Koalas)
Species	Stygionympha irrorata	Phascolarctos cinereus

Evolutionary Relationship

Karoo Hillside Brown and koala share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Karoo Hillside Brown

LC — Least Concern

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Karoo Hillside Brown	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Karoo Hillside Brown

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

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.

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.