Cuculus canorus and trogons, is often lined with the broken-off hairs of these caterpillars, which, penetrating the cuticle, assume a regular spiral arrangement, due to the rotatory motion of the muscles of the gizzard.
There were, for instance, trogons, secretary-birds, parrots, and other now Ethiopian forms in Miocene France.
The Quezal is one of the Trogons (q.v.), and was originally described by Hernandez (Historia, p. 13), whose account was faithfully copied by F.
Woodpeckers (Coloptes auratus), macaws, parrakeets and other small parrots, and trogons, these last of beautifully resplendent plumage, deserve particular mention.
Several kinds of swifts and nightjars are found, and gorgeously-coloured trogons, bee-eaters, rollers, and beautiful kingfishers and barbets are common.