Brittle Bladderfern vs Koala

Cystopteris tenuis compared with Phascolarctos cinereus

Key Differences

Brittle Bladderfern is Not Evaluated while Koala is Vulnerable.

Taxonomic Classification

Rank	Brittle Bladderfern	Koala
Kingdom	Plantae (Pflanzen)	Animalia (Tier)
Phylum	Tracheophyta	Chordata (Chordatiere)
Class	Polypodiopsida (Echte Farne)	Mammalia (Säugetiere)
Order	Polypodiales (Tüpfelfarnartige)	Diprotodontia (Marsupials)
Family	Cystopteridaceae	Phascolarctidae (Koalas)
Genus	Cystopteris	Phascolarctos (Koalas)
Species	Cystopteris tenuis	Phascolarctos cinereus

Conservation Status

Brittle Bladderfern

NE — Not Evaluated

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brittle Bladderfern	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Brittle Bladderfern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Canada 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.

Brittle Bladderfern

The Brittle Bladderfern (Cystopteris tenuis) is a species in the genus Cystopteris. Typically found in moist, shaded forest floors and tropical canopies.

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.