One-striped opossum vs Ruff

Monodelphis unistriata compared with Calidris pugnax

Key Differences

• One-striped opossum is Critically Endangered while Ruff is Least Concern.

Taxonomic Classification

Rank	One-striped opossum	Ruff
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Aves (鳥類)
Order	Didelphimorphia (Didelphimorphia)	Charadriiformes (チドリ目)
Family	Didelphidae	Scolopacidae
Genus	Monodelphis	Calidris
Species	Monodelphis unistriata	Calidris pugnax

Evolutionary Relationship

One-striped opossum and Ruff share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

One-striped opossum

CR — Critically Endangered

Ruff

LC — Least Concern

Physical Characteristics

Attribute	One-striped opossum	Ruff
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

One-striped 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）は IUCN レッドリストで軽度懸念（LC）に分類されている。分布域全体に広く分布し個体数も豊富で、個体群は安定しており差し迫った保全上の懸念はない。