Gray/Purple Heron vs Great Blue/Cocoi Heron

Ardea cinerea compared with Ardea herodias

Taxonomic Classification

Rank	Gray/Purple Heron	Great Blue/Cocoi Heron
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class same	Aves (chim)	Aves (chim)
Order same	Pelecaniformes (bộ Bồ nông)	Pelecaniformes (bộ Bồ nông)
Family same	Ardeidae	Ardeidae
Genus same	Ardea	Ardea
Species	Ardea cinerea	Ardea herodias

Evolutionary Relationship

Gray/Purple Heron and Great Blue/Cocoi Heron share a common ancestor at the Genus level: Ardea.

Conservation Status

Gray/Purple Heron

LC — Least Concern

Trend: Stable →

Great Blue/Cocoi Heron

LC — Least Concern

Physical Characteristics

Attribute	Gray/Purple Heron	Great Blue/Cocoi Heron
Diet	Carnivore	—
Average Lifespan	15 years	—
Average Length	95 cm	—
Average Weight	1.5 kg	—

Habitat & Geographic Range

Gray/Purple Heron

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries).

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).

Gray/Purple Heron

A large, elegant wading bird reaching up to 1 meter in height, gray herons inhabit wetlands, rivers, lakes, and coastal areas across Europe, Asia, and Africa. Patient, solitary hunters, they stand motionless for long periods before striking fish, frogs, and small mammals with lightning-fast dagger bill strikes. They nest colonially in tall trees in rookeries called heronries, sometimes shared with other colonial waterbirds. Widely distributed and of Least Concern globally.

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 2 countries:

🇧🇪 Belgium 🇳🇴 Norway