Fly Agaric vs koala

Amanita muscaria compared with Phascolarctos cinereus

Key Differences

• Fly Agaric is Least Concern while koala is Vulnerable.
• Fly Agaric is decomposer while koala is herbivore.
• koala is 100.0x heavier than Fly Agaric.
• koala lives longer (15 years vs 1 years).

Taxonomic Classification

Rank	Fly Agaric	koala
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (Mammals)
Order	Agaricales (Gilled Mushrooms)	Diprotodontia (Marsupials)
Family	Agaricaceae (Agarics)	Phascolarctidae (Koalas)
Genus	Amanita (Amanitas)	Phascolarctos (Koalas)
Species	Amanita muscaria	Phascolarctos cinereus

Conservation Status

Fly Agaric

LC — Least Concern

Trend: Stable →

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Fly Agaric	koala
Diet	Decomposer	Herbivore
Average Lifespan	1 years	15 years
Average Length	20 cm	75 cm
Average Weight	100 g	10.0 kg

Habitat & Geographic Range

Fly Agaric

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (New Zealand), and South America (Brazil, Chile, Colombia).

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.

Fly Agaric

Among the most iconic and recognizable fungi on Earth, fly agaric mushrooms display striking red caps with white flecked warts across boreal forests of the Northern Hemisphere. Despite their fairy-tale appearance, they contain potent psychoactive compounds including muscimol and ibotenic acid and are moderately toxic. They form critical mycorrhizal symbioses with birch, pine, and spruce trees, exchanging mineral nutrients for carbon and playing essential roles in boreal forest nutrient cycling.

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.