The African ostrich is the largest living ratite. Dromaius is a genus of ratite present in Australia. It may have had good vision and intelligence comparable to ratite birds. It was a ratite and a member of the Struthioniformes Order. It was a ratite and a member of the order Dinornithiformes. It was a ratite and a member of the order Struthioniformes. The common ostrich belongs to the ratite order Struthioniformes. This family of flightless ratite birds is represented by two living species in Australia. These findings imply that evolution of flightlessness occurred independently multiple times in ratite evolution. They share a similar fauna which includes marsupial and monotreme mammals and ratite birds. Rheidae is a family of flightless ratite birds which first appeared in the Paleocene. Moa belong to the order Dinornithiformes, traditionally placed in the ratite group. The obscure ratite "Hypselornis" was found here. It is the fifth heaviest living bird species, after only the larger varieties of ratite. It is a ratite and therefore related to the emu, ostriches, rheas and kiwis.