The family is divided into four groups: 30 species of new world quail, residing between Paraguay and Canada, 11 species of Old World quails in Africa, Australia, and Asia, 94 species of partridges, and 48 species of pheasants. This family includes a wide range of bird sizes from a 5 ½-inch quail to pheasants up to almost 30 inches. Pheasants and quails have heavy, round bodies and rounded wings. Though they have short legs, they are very fast runners when escaping predators.