Mid-Paleocene–Present |image = Ratites.PNG |image_width = 258px |image_caption = Various ratite birds |regnum = Animalia |phylum = Chordata |classis = Aves |subclassis = Neornithes |superordo = Paleognathae |ordo = Struthioniformes* |ordo_authority = (Latham, 1790) |subdivision_ranks = Families |subdivision = Struthionidae ostrich Rheidae rhea Casuariidae emu, cassowary †Aepyornithidae elephant bird †Dinornithidae moa Apterygidae kiwi | synonyms = Struthiornithiformes }} A rat… (More on Ratite)