Blue-Gray Rosette Lichen vs Koala

Physcia caesia compared with Phascolarctos cinereus

Key Differences

Blue-Gray Rosette Lichen is Least Concern while Koala is Vulnerable.

Taxonomic Classification

Rank	Blue-Gray Rosette Lichen	Koala
Kingdom	Fungi (Pilze)	Animalia (Tier)
Phylum	Ascomycota (Schlauchpilze)	Chordata (Chordatiere)
Class	Lecanoromycetes (Lecanoromycetes)	Mammalia (Säugetiere)
Order	Caliciales (Caliciales)	Diprotodontia (Marsupials)
Family	Physciaceae	Phascolarctidae (Koalas)
Genus	Physcia	Phascolarctos (Koalas)
Species	Physcia caesia	Phascolarctos cinereus

Conservation Status

Blue-Gray Rosette Lichen

LC — Least Concern

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Blue-Gray Rosette Lichen	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Blue-Gray Rosette Lichen

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States.

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.

Blue-Gray Rosette Lichen

The Blue Gray Rosette Lichen (Physcia caesia) is a species in the genus Physcia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

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.