Laysan Duck vs Threeleaf Halberd Fern

Anas laysanensis compared with Tectaria trifoliata

Key Differences

• Laysan Duck is Critically Endangered while Threeleaf Halberd Fern is Near Threatened.

Taxonomic Classification

Rank	Laysan Duck	Threeleaf Halberd Fern
Kingdom	Animalia (สัตว์)	Plantae (พืช)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Tracheophyta
Class	Aves (นก)	Polypodiopsida (Polypodiopsida)
Order	Anseriformes (อันดับห่าน)	Polypodiales (Polypodiales)
Family	Anatidae	Tectariaceae
Genus	Anas	Tectaria
Species	Anas laysanensis	Tectaria trifoliata

Conservation Status

Laysan Duck

CR — Critically Endangered

Threeleaf Halberd Fern

NT — Near Threatened

Physical Characteristics

Attribute	Laysan Duck	Threeleaf Halberd Fern
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.

Threeleaf Halberd Fern

Habitat

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

Range

Distributed across Brazil, Colombia, and Cuba. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.