Laysan Duck vs Simons’s Mouse Opossum

Anas laysanensis compared with Marmosa simonsi

Key Differences

• Laysan Duck is Critically Endangered while Simons’s Mouse Opossum is Not Evaluated.

Taxonomic Classification

Rank	Laysan Duck	Simons’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Anseriformes (Anseriformes)	Didelphimorphia (Didelphimorphia)
Family	Anatidae	Didelphidae
Genus	Anas	Marmosa
Species	Anas laysanensis	Marmosa simonsi

Evolutionary Relationship

Laysan Duck and Simons’s Mouse Opossum share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Laysan Duck

CR — Critically Endangered

Simons’s Mouse Opossum

NE — Not Evaluated

Physical Characteristics

Attribute	Laysan Duck	Simons’s Mouse Opossum
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.

Simons’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

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.