Brittle Bladderfern vs Brown Rat

Cystopteris tenuis compared with Rattus norvegicus

Key Differences

• Brittle Bladderfern is Not Evaluated while Brown Rat is Least Concern.

Taxonomic Classification

Rank	Brittle Bladderfern	Brown Rat
Kingdom	Plantae (bitki)	Animalia (hayvan)
Phylum	Tracheophyta	Chordata (Kordalılar)
Class	Polypodiopsida (Polypodiopsida)	Mammalia (memeliler)
Order	Polypodiales (Polypodiales)	Rodentia (kemiriciler)
Family	Cystopteridaceae	Muridae (Mice & Rats)
Genus	Cystopteris	Rattus
Species	Cystopteris tenuis	Rattus norvegicus

Conservation Status

Brittle Bladderfern

NE — Not Evaluated

Brown Rat

LC — Least Concern

Physical Characteristics

Attribute	Brittle Bladderfern	Brown Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brittle Bladderfern

Habitat

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

Range

Distributed across Canada and United States.

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

Brittle Bladderfern

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

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 2 countries:

🇨🇦 Canada 🇺🇸 United States