Bladder Fern vs clouded magpie

Cystopteris fragilis compared with Abraxas sylvata

Key Differences

• Bladder Fern is Not Evaluated while clouded magpie is Vulnerable.

Taxonomic Classification

Rank	Bladder Fern	clouded magpie
Kingdom	Plantae (พืช)	Animalia (สัตว์)
Phylum	Tracheophyta	Arthropoda (สัตว์ขาปล้อง)
Class	Polypodiopsida (Polypodiopsida)	Insecta (แมลง)
Order	Polypodiales (Polypodiales)	Lepidoptera (ผีเสื้อ)
Family	Cystopteridaceae	Geometridae
Genus	Cystopteris	Abraxas
Species	Cystopteris fragilis	Abraxas sylvata

Conservation Status

Bladder Fern

NE — Not Evaluated

clouded magpie

VU — Vulnerable

Physical Characteristics

Attribute	Bladder Fern	clouded magpie
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bladder Fern

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (Canada, United States), and South America (Colombia).

clouded magpie

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bladder Fern

The Bladder Fern (Cystopteris fragilis) is a species in the genus Cystopteris. Typically found in moist, shaded forest floors and tropical canopies.

clouded magpie

The clouded magpie (Abraxas sylvata) is a geometrid moth in the family Geometridae found across temperate Europe, extending eastward through Russia to Japan. The adult wingspan measures approximately 32–42 mm, with white wings bearing a distinctive pattern of yellow-orange and dark grey to black spots and patches arranged in rows across the forewing and hindwing, creating a striking patterned appearance resembling the magpie coloring of the related magpie moth Abraxas grossulariata, but with a more yellowish, muted tone and less black — hence 'clouded.' Adults fly in one generation from June to July, resting on leaf surfaces and attending woodland flowers for nectar. The larvae feed on wych elm (Ulmus glabra) and occasionally other Ulmus species in mature deciduous woodland and woodland edges. The clouded magpie has become less common in parts of its European range due to the widespread loss of mature elms from Dutch elm disease, which devastated European elm populations from the 1970s onward. Conservation of this species requires the protection of surviving mature elm trees and management of regrowth elms in woodland ecosystems.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden