Ruff vs Spoon-billed Sandpiper

Calidris pugnax compared with Calidris pygmaea

Key Differences

• Ruff is Least Concern while Spoon-billed Sandpiper is Not Evaluated.

Taxonomic Classification

Rank	Ruff	Spoon-billed Sandpiper
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Aves (นก)	Aves (นก)
Order same	Charadriiformes (Charadriiformes)	Charadriiformes (Charadriiformes)
Family same	Scolopacidae	Scolopacidae
Genus same	Calidris	Calidris
Species	Calidris pugnax	Calidris pygmaea

Evolutionary Relationship

Ruff and Spoon-billed Sandpiper share a common ancestor at the Genus level: Calidris.

Conservation Status

Ruff

LC — Least Concern

Spoon-billed Sandpiper

NE — Not Evaluated

Physical Characteristics

Attribute	Ruff	Spoon-billed Sandpiper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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).

Spoon-billed Sandpiper

Habitat

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

Range

Distributed across Sweden and Taiwan.

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.

Shared Countries

Both species can be found in 2 countries:

🇸🇪 Sweden 🇹🇼 Taiwan