Laysan Duck vs Niceforo Maria’s Oldfield Mouse

Anas laysanensis compared with Thomasomys nicefori

Key Differences

• Laysan Duck is Critically Endangered while Niceforo Maria’s Oldfield Mouse is Least Concern.

Taxonomic Classification

Rank	Laysan Duck	Niceforo Maria’s Oldfield Mouse
Kingdom same	Animalia (hewan)	Animalia (hewan)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (burung)	Mammalia (mamalia)
Order	Anseriformes (Anseriformes)	Rodentia (hewan pengerat)
Family	Anatidae	Cricetidae
Genus	Anas	Thomasomys
Species	Anas laysanensis	Thomasomys nicefori

Evolutionary Relationship

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

Conservation Status

Laysan Duck

CR — Critically Endangered

Niceforo Maria’s Oldfield Mouse

LC — Least Concern

Physical Characteristics

Attribute	Laysan Duck	Niceforo Maria’s Oldfield Mouse
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.

Niceforo Maria’s Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

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.