A bird in the trogon family (Trogonidae), about 35 cm long, that has iridescent, golden or green back and wings, a red breast and belly, and a long tail, although in some species females are mainly grey or brown. Quetzals occur in forests, and are most common in humid upland regions, throughout the New World tropics. Most are solitary. They feed on fruit, insects, and small vertebrates. There are two genera with six species. The resplendent quetzal (Pharomachus mocinno) is the national bird of Guatemala and the nation’s currency is the quetzal.