Quetzal ("Merriam-Webster's Collegiate Dictionary"), from the Nahuatl root = "stand up" used to refer to an upstanding plume of feathers. The word entered English through Spanish. The word "quetzal" was originally used for just the resplendent quetzal, the long-tailed quetzal of Guatemala, (more specifically a town called Petén) which is the national bird and the name of the currency of Guatemala. It still often refers to that bird specifically but now also names all the species of the genera "Pharomachrus" and "Euptilotis". "Pharomachrus" is from Ancient Greek , "mantle", and , "long", referring to the wing and tail coverts of the
Golden-headed quetzal male and female become a monogamous pair and create a cavity nest in an old tree. During breeding season both sexes share brooding and feeding duties for 25–30 days until the chick is ready to fledge. The golden-headed quetzal is fairly common and considered a species of least concern. The golden-headed quetzal, also known by the Spanish name "pilco real", was first described by John Gould in the 2nd edition of "A Monograph of the Trogonidae or family of Trogons" published in 1875. It is one of five birds in the genus "Pharomachrus", known as quetzals, and is included in