Great Blue/Cocoi Heron vs King/Common Eider

Ardea herodias compared with Somateria spectabilis

Key Differences

• Great Blue/Cocoi Heron is Least Concern while King/Common Eider is Not Evaluated.

Taxonomic Classification

Rank	Great Blue/Cocoi Heron	King/Common Eider
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Aves (นก)	Aves (นก)
Order	Pelecaniformes (อันดับนกกระทุง)	Anseriformes (อันดับห่าน)
Family	Ardeidae	Anatidae
Genus	Ardea	Somateria
Species	Ardea herodias	Somateria spectabilis

Evolutionary Relationship

Great Blue/Cocoi Heron and King/Common Eider share a common ancestor at the Class level: Aves. (นก)

Conservation Status

Great Blue/Cocoi Heron

LC — Least Concern

King/Common Eider

NE — Not Evaluated

Physical Characteristics

Attribute	Great Blue/Cocoi Heron	King/Common Eider
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Great Blue/Cocoi Heron

Habitat

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

Range

Widely distributed across Europe (5 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela).

King/Common Eider

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Great Blue/Cocoi Heron

Great Blue/Cocoi Heron (Ardea herodias) 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 3 countries:

🇧🇪 Belgium 🇳🇴 Norway 🇺🇸 United States