Atlantic Gray Seal vs Ruff

Halichoerus grypus compared with Calidris pugnax

Key Differences

• Atlantic Gray Seal is Vulnerable while Ruff is Least Concern.

Taxonomic Classification

Rank	Atlantic Gray Seal	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	Pinnipedia (Seals & Sea Lions)	Charadriiformes (チドリ目)
Family	Phocidae (True Seals)	Scolopacidae
Genus	Halichoerus	Calidris
Species	Halichoerus grypus	Calidris pugnax

Evolutionary Relationship

Atlantic Gray Seal and Ruff share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Ruff

LC — Least Concern

Physical Characteristics

Attribute	Atlantic Gray Seal	Ruff
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Gray Seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its 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).

Atlantic Gray Seal

The Atlantic Gray Seal (Halichoerus grypus) is a species in the genus Halichoerus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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。

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden