Corn Crake vs Great Blue/Cocoi Heron

Crex crex compared with Ardea herodias

Key Differences

Corn Crake is Critically Endangered while Great Blue/Cocoi Heron is Least Concern.

Taxonomic Classification

Rank	Corn Crake	Great Blue/Cocoi Heron
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Gruiformes (Gruiformes)	Pelecaniformes (Pelecaniformes)
Family	Rallidae	Ardeidae
Genus	Crex	Ardea
Species	Crex crex	Ardea herodias

Evolutionary Relationship

Corn Crake and Great Blue/Cocoi Heron share a common ancestor at the Class level: Aves. (Birds)

View Class: Aves

Conservation Status

Corn Crake

CR — Critically Endangered

Great Blue/Cocoi Heron

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Corn Crake

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 8 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (6 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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).

Corn Crake

Corn Crake (Crex crex) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.

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.