The black-headed trogon (Trogon melanocephalus) reaches a size of 28-30 cm. It shows sexual dimorphism, with differences in plumage between males and females.
The male has a dark metallic green head, upper chest, and back. Its face is black, the throat and chest are black, and the lower chest and belly are orange-red. The wings are gray on the upper side.
The female has a metallic bronze plumage. The upper part of the abdomen is white, and it has a small vertical white stripe behind the eye.
The black-headed trogon inhabits northern Costa Rica. It feeds on fruits and insects, which it often captures in flight. They nest at a height of 2-6 meters in tree cavities, usually in abandoned woodpecker nests. The female typically lays between 2 and 3 eggs.