Brittle Bladderfern vs Common Roller

Cystopteris tenuis compared with Ancylis badiana

Key Differences

• Brittle Bladderfern is Not Evaluated while Common Roller is Least Concern.

Taxonomic Classification

Rank	Brittle Bladderfern	Common Roller
Kingdom	Plantae (植物)	Animalia (动物界)
Phylum	Tracheophyta	Arthropoda (节肢动物门)
Class	Polypodiopsida (水龍骨綱)	Insecta (昆蟲綱)
Order	Polypodiales (水龙骨目)	Lepidoptera (鱗翅目)
Family	Cystopteridaceae	Tortricidae
Genus	Cystopteris	Ancylis
Species	Cystopteris tenuis	Ancylis badiana

Conservation Status

Brittle Bladderfern

NE — Not Evaluated

Common Roller

LC — Least Concern

Physical Characteristics

Attribute	Brittle Bladderfern	Common Roller
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.

Common Roller

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Brittle Bladderfern

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

Common Roller

<em>Ancylis badiana</em>, the common roller, is a small moth in the family Tortricidae, order Lepidoptera. It is distributed across northwestern Europe, with documented records from Belgium, Denmark, Norway, and Sweden, typically inhabiting woodland margins, hedgerows, scrubland, and areas where its larval host plants are abundant. The species is assessed as Least Concern on the IUCN Red List. Tortricid moths in the genus Ancylis are commonly known as "rollers" or "leafrollers" because their larvae typically roll or fold leaves of host plants to create sheltered feeding structures. <em>Ancylis badiana</em> larvae feed on the foliage of various herbaceous plants, particularly species in the pea family (Fabaceae). Adults are small moths with intricately patterned wings that provide camouflage against bark and plant material. Adult moths are primarily nocturnal and are attracted to light, while larvae are cryptic within their leaf shelters. Biological traits such as lifespan, body measurements, and detailed diet host range remain poorly documented beyond general family-level characteristics. The species typically completes one to two generations per year in temperate European climates, overwintering as pupae. It is considered a minor component of invertebrate biodiversity in European lowland habitats.