Great Curassow

Overview

The Great Curassow is a large, forest-dwelling gamebird found from eastern Mexico through Central America to western Colombia and Ecuador. Males are glossy black overall with a white lower belly, a curly crest of forward-curling feathers, and a bright yellow fleshy knob at the base of the bill. Females are notably polymorphic, occurring in barred, rufous, or blackish color morphs, a trait that adds complexity to field identification within a single population.

Feather Identification

• Male: Glossy black plumage overall with an iridescent sheen, a white lower belly and undertail coverts, and a crest of forward-curling black feathers on the crown; a fleshy yellow knob at the base of the bill is a key field mark, though it is bare skin rather than feathering.
• Female (barred morph): Fine black-and-white barring over the body with a barred crest.
• Female (rufous morph): Warm chestnut plumage overall.
• Female (blackish morph): Darker overall tone, less barred.
• Versus similar curassows: Other curassow species lack the curly crest seen in this species.

Plumage Notes

The species shows pronounced sexual dimorphism, and females additionally show polymorphism with multiple distinct color morphs occurring within the same population, an unusual trait among birds. Juveniles resemble females but are duller. A single complete molt occurs annually.

Habitat & Range

The Great Curassow is found from eastern Mexico through Central America to western Colombia and Ecuador. It inhabits the interior of humid lowland and foothill tropical forest, generally avoiding open or heavily disturbed areas, and is resident and non-migratory.

Behavior & Field Notes

Great Curassows forage on the forest floor for fallen fruit, seeds, and small animals, typically in pairs or family groups. They roost and nest in trees. Males give a low, booming call, and pairs may duet. The species is sensitive to hunting pressure and habitat loss due to its large size and forest-floor habits.