Heavy-browed Mouse Opossum vs Ruff

Marmosa andersoni compared with Calidris pugnax

Key Differences

• Heavy-browed Mouse Opossum is Data Deficient while Ruff is Least Concern.

Taxonomic Classification

Rank	Heavy-browed Mouse Opossum	Ruff
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Didelphimorphia (Didelphimorphia)	Charadriiformes (Charadriiformes)
Family	Didelphidae	Scolopacidae
Genus	Marmosa	Calidris
Species	Marmosa andersoni	Calidris pugnax

Evolutionary Relationship

Heavy-browed Mouse Opossum and Ruff share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Heavy-browed Mouse Opossum

DD — Data Deficient

Ruff

LC — Least Concern

Physical Characteristics

Attribute	Heavy-browed Mouse Opossum	Ruff
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Heavy-browed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Ruff

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), North America (United States), and South America (Colombia, Venezuela).

Ruff

Ruff (Calidris pugnax) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.