Humpback Brittlegill vs koala

Russula caerulea compared with Phascolarctos cinereus

Key Differences

Humpback Brittlegill is Near Threatened while koala is Vulnerable.

Taxonomic Classification

Rank	Humpback Brittlegill	koala
Kingdom	Fungi (Fungi)	Animalia (animal)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (mammifères)
Order	Russulales (Russulales)	Diprotodontia (Marsupials)
Family	Russulaceae	Phascolarctidae (Koalas)
Genus	Russula	Phascolarctos (Koalas)
Species	Russula caerulea	Phascolarctos cinereus

Conservation Status

Humpback Brittlegill

NT — Near Threatened

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Humpback Brittlegill

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

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.