The trogons and quetzals are in the order Trogoniformes which contains only one family, the Trogonidae. The family contains 39 species in eight genera. The fossil record of the trogons dates back 49 million years to the mid-Eocene. The word "trogon" is Greek for "nibbling" and refers to the fact that these birds gnaw holes in trees to make their nests. Trogons are residents of tropical forests worldwide. The greatest diversity is in the Neotropics, where four genera, containing 24 species occur. Photos are presented on those highlighted in red and represent all those in ComingsBirds.com including those from Costa Rica all of which are in the genus Trogon.

Genus Apaloderma
Narina Trogon, Apaloderma narina
Bare-cheeked Trogon, Apaloderma aequatoriale
Bar-tailed Trogon, Apaloderma vittatum
Genus Apalharpactes
Javan Trogon, Apalharpactes reinwardtii
Sumatran Trogon Apalharpactes mackloti
Genus Harpactes
Malabar Trogon, Harpactes fasciatus
Red-naped Trogon, Harpactes kasumba
Diard's Trogon, Harpactes diardii
Philippine Trogon, Harpactes ardens
Whitehead's Trogon, Harpactes whiteheadi
Cinnamon-rumped Trogon, Harpactes orrhophaeus
Scarlet-rumped Trogon, Harpactes duvaucelii
Red-headed Trogon, Harpactes erythrocephalus
Orange-breasted Trogon, Harpactes oreskios
Ward's Trogon, Harpactes wardi
Genus Priotelus
Cuban Trogon, Priotelus temnurus
Hispaniolan Trogon, Priotelus roseigaster
Genus Trogon
Black-headed Trogon, Trogon melanocephalus
Citreoline Trogon, Trogon citreolus
White-tailed Trogon, Trogon viridis
Amazonian White-tailed Trogon, Trogon (v.) viridis
Western White-tailed Trogon, Trogon (viridis) chionurus
Baird's Trogon, Trogon bairdii
Violaceous Trogon, Trogon violaceus
Amazonian Trogon, Trogon (violaceus) ramonianus
Gartered Trogon, Trogon caligatus
Mountain Trogon, Trogon mexicanus
White-eyed Trogon, Trogon comptus
Collared Trogon, Trogon collaris
Elegant Trogon, Trogon elegans
Orange-bellied Trogon, Trogon aurantiiventris
Masked Trogon, Trogon personatus
Black-throated Trogon, Trogon rufus
Surucua Trogon, Trogon surrucura
Brazilian Trogon, Trogon (surrucura) aurantius
Blue-crowned Trogon, Trogon curucui
Black-tailed Trogon, Trogon melanurus
Ecuadorian Trogon, Trogon mesurus
Slaty-tailed Trogon, Trogon massena
Lattice-tailed Trogon, Trogon clathratus
Genus Euptilotis
Eared Quetzal, Euptilotis neoxenus
Genus Pharomachrus
Resplendent Quetzal, Pharomachrus mocinno
Crested Quetzal, Pharomachrus antisianus
White-tipped Quetzal, Pharomachrus fulgidus
Golden-headed Quetzal, Pharomachrus auriceps
Pavonine Quetzal, Pharomachrus pavoninus

Photos are available for the species highlighted in red.