Laysan Duck vs Roostertree

Anas laysanensis compared with Calotropis procera

Key Differences

• Laysan Duck is Critically Endangered while Roostertree is Not Evaluated.

Taxonomic Classification

Rank	Laysan Duck	Roostertree
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Aves (Birds)	Magnoliopsida (Dicots)
Order	Anseriformes (Anseriformes)	Gentianales (Gentianales)
Family	Anatidae	Apocynaceae
Genus	Anas	Calotropis
Species	Anas laysanensis	Calotropis procera

Conservation Status

Laysan Duck

CR — Critically Endangered

Roostertree

NE — Not Evaluated

Physical Characteristics

Attribute	Laysan Duck	Roostertree
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.

Roostertree

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Africa (11 countries), Asia (5 countries), Europe (Spain), North America (16 countries), Oceania and the Pacific (Australia, Palau, Samoa), and South America (7 countries).

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.