Zerbrechlicher Blasenfarn vs Hahnenschwanztyrann

Cystopteris fragilis compared with Alectrurus tricolor

Key Differences

• Zerbrechlicher Blasenfarn is Not Evaluated while Hahnenschwanztyrann is Vulnerable.

Taxonomic Classification

Rank	Zerbrechlicher Blasenfarn	Hahnenschwanztyrann
Kingdom	Plantae (Pflanzen)	Animalia (Tier)
Phylum	Tracheophyta	Chordata (Chordatiere)
Class	Polypodiopsida (Echte Farne)	Aves (Vögel)
Order	Polypodiales (Tüpfelfarnartige)	Passeriformes (Sperlingsvögel)
Family	Cystopteridaceae	Tyrannidae
Genus	Cystopteris	Alectrurus
Species	Cystopteris fragilis	Alectrurus tricolor

Conservation Status

Zerbrechlicher Blasenfarn

NE — Not Evaluated

Hahnenschwanztyrann

VU — Vulnerable

Physical Characteristics

Attribute	Zerbrechlicher Blasenfarn	Hahnenschwanztyrann
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Zerbrechlicher Blasenfarn

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).

Hahnenschwanztyrann

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Zerbrechlicher Blasenfarn

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

Hahnenschwanztyrann

The cock-tailed tyrant (Alectrurus tricolor) is a striking and unusual flycatcher in the family Tyrannidae, named for the remarkable elongated, spatula-shaped outer tail feathers of the male, which can exceed the body length and are displayed during aerial courtship flights over open grasslands. The species inhabits wet and seasonally flooded grasslands, cerrado savanna, and campos in the interior of South America, including central Brazil, eastern Bolivia, Paraguay, and northeastern Argentina — not Norway, as erroneous database entries suggest. Males combine conspicuous black, white, and rufous plumage with their extraordinary tail streamers in an elaborate display to attract females on leks; females are cryptically streaked brown. The cock-tailed tyrant is a ground- and low-vegetation forager, preying on insects and other small invertebrates gleaned from grass stems and caught in aerial sallies. The species is classified as Vulnerable by the IUCN due to extensive and continuing conversion and degradation of its native Neotropical grassland habitat through intensive soy and sugarcane agriculture, cattle ranching, fire management changes, and drainage of seasonally flooded grasslands. Populations have declined significantly across much of its range, particularly in Brazil and Paraguay. The species is a flagship for threatened grassland conservation in South America, where relatively little protection has historically been directed at open-country habitats compared to forest ecosystems.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway