Bufflehead vs Great Blue/Cocoi Heron

Bucephala albeola compared with Ardea herodias

Key Differences

• Bufflehead is Not Evaluated while Great Blue/Cocoi Heron is Least Concern.

Taxonomic Classification

Rank	Bufflehead	Great Blue/Cocoi Heron
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Aves (นก)	Aves (นก)
Order	Anseriformes (อันดับห่าน)	Pelecaniformes (อันดับนกกระทุง)
Family	Anatidae	Ardeidae
Genus	Bucephala	Ardea
Species	Bucephala albeola	Ardea herodias

Evolutionary Relationship

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

Conservation Status

Bufflehead

NE — Not Evaluated

Great Blue/Cocoi Heron

LC — Least Concern

Physical Characteristics

Attribute	Bufflehead	Great Blue/Cocoi Heron
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bufflehead

Habitat

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

Range

Found across Europe (11 countries) and North America (United States).

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).

Bufflehead

Bufflehead (Bucephala albeola) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.

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 6 countries:

🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇬🇧 United Kingdom 🇺🇸 United States