koala vs Rusty-backed Antwren

Phascolarctos cinereus compared with Formicivora rufa

Key Differences

• koala is Vulnerable while Rusty-backed Antwren is Least Concern.

Taxonomic Classification

Rank	koala	Rusty-backed Antwren
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Diprotodontia (Marsupials)	Passeriformes (Songbirds)
Family	Phascolarctidae (Koalas)	Thamnophilidae
Genus	Phascolarctos (Koalas)	Formicivora
Species	Phascolarctos cinereus	Formicivora rufa

Evolutionary Relationship

koala and Rusty-backed Antwren share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Rusty-backed Antwren

LC — Least Concern

Physical Characteristics

Attribute	koala	Rusty-backed Antwren
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.

Rusty-backed Antwren

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway.

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.