The only living representative is the hoatzin ( " Opisthocomus hoazin " ) which lives in the Amazon and the Orinoco delta in South America.
2.
It includes a lines representing the three main rivers of Guyana; and the national bird, the Canje Pheasant ( " Opisthocomus hoazin " ).
3.
Historically, the buttonquails ( Turnicidae ), mesites ( Mesitornithidae ) and the hoatzin ( " Opisthocomus hoazin " ) were placed in the Galliformes, too.