Black-headed Trogon

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. Voice: The black-headed trogon is vocal and often detected by its calls. The most common call is " a loud series of 15-20 accelerating clucks or 'cuck' notes". It is sometimes sung by a pair as a duet and also by small groups of individuals. The species' alarm call is "a single low 'cuck'".