The Black Guan (Chamaepetes unicolor), is a species of bird found in Costa Rica and Panama. Its natural habitat is subtropical or tropical moist mountains. It is threatened by loss of habitat.
Adults are about 25 inches in length and weigh about 33 ounces. It is usually a silent bird, but will give a deep ro-rooo or a groaning kowr when startled. Most of the noise it makes is not by its voice, but from crashing through branches of trees.
It nests on large, low branches, about 15 feet above the ground. Its diet consists almost wholly of fruit that is taken both from trees and the ground.