A small order of birds that contains only the family Trogonidae. Thirty-seven species are found throughout the tropics; two species reach the southern border of the United States. The trogons and quetzals are jay-sized birds with large heads, and tails that vary from medium length and squared to very elongated and tapered. The dorsal plumage of trogons and quetzals is predominantly metallic green, with blue, violet, red, black, or grey in a few. The ventral feathers are bright red, yellow, or orange. Despite their vivid coloration, the birds are inconspicuous when sitting quietly in the forest. Quetzals possess long tapered tails of upper covert feathers, not tail feathers. Trogon plumage is soft with lax feathers. Sexes are dissimilar in appearance, with the males being more brightly colored. The head is large and rounded, and the bill is small and weak. Legs are short and feet are weak, with the toes arranged in a heterodactyl fashion, with the first and second toes reverted, opposing the third and fourth toes. Flight is rapid, undulating, and brief; trogons rarely walk. The diet consists of fruit and small invertebrates, as well as insects caught in flight as the bird darts out from a perch.