Laysan Duck vs Upper Crust

Anas laysanensis compared with Amaurodon cyaneus

Key Differences

Laysan Duck is Critically Endangered while Upper Crust is Vulnerable.

Taxonomic Classification

Rank	Laysan Duck	Upper Crust
Kingdom	Animalia (hewan)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Aves (burung)	Agaricomycetes (Mushrooms)
Order	Anseriformes (Anseriformes)	Thelephorales (Thelephorales)
Family	Anatidae	Thelephoraceae
Genus	Anas	Amaurodon
Species	Anas laysanensis	Amaurodon cyaneus

Conservation Status

Laysan Duck

CR — Critically Endangered

Upper Crust

VU — Vulnerable

Physical Characteristics

Attribute	Laysan Duck	Upper Crust
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.

Upper Crust

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.