Laysan Duck vs Rock Foam

Anas laysanensis compared with Stereocaulon saxatile

Key Differences

Laysan Duck is Critically Endangered while Rock Foam is Near Threatened.

Taxonomic Classification

Rank	Laysan Duck	Rock Foam
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Aves (Birds)	Lecanoromycetes (Lecanoromycetes)
Order	Anseriformes (Anseriformes)	Lecanorales (Lecanorales)
Family	Anatidae	Stereocaulaceae
Genus	Anas	Stereocaulon
Species	Anas laysanensis	Stereocaulon saxatile

Conservation Status

Laysan Duck

CR — Critically Endangered

Rock Foam

NT — Near Threatened

Physical Characteristics

Attribute	Laysan Duck	Rock Foam
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.

Rock Foam

Habitat

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

Range

Distributed across Denmark, Norway, Sweden, and United States. 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.