This group is made up of the trogons and quetzals. They are arboreal birds with a richly coloured plumage, and inhabit tropical forests. They are insectivores or frugivores. They are the only heterodactyl animals, i.e. digits III and IV point forward while toes I and II point backwards. They are known to be very inactive outside the nesting and breeding periods. The nest is located in cavities in dead wood or disused termite nests.