The family known as Cracidae (Guans, Curassows & Chachalacas) along with Megapodiidae (Megapodes), Numididae (Guineafowl), Odontophoridae (New World Quails) and Phasianidae (Partridges, Pheasants, Grouse & Allies) are Galliformes, one of the largest of bird orders.