Black-headed Trogon

The black-headed trogon (Trogon melanocephalus) is a species of bird in the family Trogonidae. It is found in Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua. == Taxonomy and systematics == The black-headed trogon is treated as monotypic by the International Ornithological Committee and BirdLife International's Handbook of the Birds of the World. However, the Clements taxonomy assigns it two subspecies, the nominate T. m. melanocephalus and T. m. illaetabilis. This article follows the monotypic model. == Description == The black-headed trogon is 27 to 28 cm (11 to 11 in) long and weighs about 74 to 95 g (2.6 to 3.4 oz). Adults of both sexes have slate-black to black head, neck, and chest. A sky-blue ring of bare skin surrounds the dark eye. A thin white line separates the chest from the rest of their underparts, which are cadmium to chrome yellow that becomes lighter at the vent area. The two inner pairs of tail feathers are metallic bronze breen to bluish green with black tips. The next pair are all black and the outermost three pairs are black with wide white tips. Their wings are slate black with some white. Adult males' upperparts are bright…