Laysan Duck vs Variable-Leaved Crestwort

Anas laysanensis compared with Lophocolea heterophylla

Key Differences

Laysan Duck is Critically Endangered while Variable-Leaved Crestwort is Least Concern.

Taxonomic Classification

Rank	Laysan Duck	Variable-Leaved Crestwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Marchantiophyta (liverwort)
Class	Aves (Birds)	Jungermanniopsida (Jungermanniopsida)
Order	Anseriformes (Anseriformes)	Jungermanniales (Jungermanniales)
Family	Anatidae	Lophocoleaceae
Genus	Anas	Lophocolea
Species	Anas laysanensis	Lophocolea heterophylla

Conservation Status

Laysan Duck

CR — Critically Endangered

Variable-Leaved Crestwort

LC — Least Concern

Physical Characteristics

Attribute	Laysan Duck	Variable-Leaved Crestwort
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.

Variable-Leaved Crestwort

Habitat

Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

Range

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

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.