Black-shouldered Opossum vs Laysan Duck

Caluromysiops irrupta compared with Anas laysanensis

Key Differences

• Black-shouldered Opossum is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Black-shouldered Opossum	Laysan Duck
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Aves (นก)
Order	Didelphimorphia (Didelphimorphia)	Anseriformes (อันดับห่าน)
Family	Didelphidae	Anatidae
Genus	Caluromysiops	Anas
Species	Caluromysiops irrupta	Anas laysanensis

Evolutionary Relationship

Black-shouldered Opossum and Laysan Duck share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Black-shouldered Opossum

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Black-shouldered Opossum	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-shouldered Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

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.

Black-shouldered Opossum

The Black-shouldered Opossum (Caluromysiops irrupta) is a species in the genus Caluromysiops. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.