hedgehog vs koala

Erinaceus europaeus compared with Phascolarctos cinereus

Key Differences

hedgehog is Least Concern while koala is Vulnerable.

Taxonomic Classification

Rank	hedgehog	koala
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Erinaceomorpha (Erinaceomorpha)	Diprotodontia (Marsupials)
Family	Erinaceidae	Phascolarctidae (Koalas)
Genus	Erinaceus	Phascolarctos (Koalas)
Species	Erinaceus europaeus	Phascolarctos cinereus

Evolutionary Relationship

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

View Class: Mammalia

Conservation Status

hedgehog

LC — Least Concern

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	hedgehog	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

hedgehog

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (China, Japan), Europe (8 countries), and Oceania and the Pacific (New Zealand).

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.

hedgehog

hedgehog (Erinaceus europaeus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

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.