Laysan Duck vs Streamside Swordfern

Anas laysanensis compared with Nephrolepis rivularis

Key Differences

• Laysan Duck is Critically Endangered while Streamside Swordfern is Not Evaluated.

Taxonomic Classification

Rank	Laysan Duck	Streamside Swordfern
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Tracheophyta
Class	Aves (Birds)	Polypodiopsida (Polypodiopsida)
Order	Anseriformes (Anseriformes)	Polypodiales (Polypodiales)
Family	Anatidae	Nephrolepidaceae
Genus	Anas	Nephrolepis
Species	Anas laysanensis	Nephrolepis rivularis

Conservation Status

Laysan Duck

CR — Critically Endangered

Streamside Swordfern

NE — Not Evaluated

Physical Characteristics

Attribute	Laysan Duck	Streamside Swordfern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Laysan Duck

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Belgium, France, Netherlands, Norway, and United Kingdom. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Streamside Swordfern

Habitat

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

Range

Distributed across Brazil, Colombia, and Cuba.

Laysan Duck

Laysan Duck (Anas laysanensis) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.