Casuariiformes Casuariiformes The Casuariiformes is an order of large flightless bird that has four surviving members: the three species of cassowary, and the only remaining species of emu. They are divided into either a single family, Casuariidae, or more typically two, with the emu splitting off into its own family, Dromaiidae. All four living members are native to Australia-New Guinea, but some possible extinct taxa occurred in other landmasses. The emus form a distinct family, characterized by legs adapted for running. As with all ratites, there are several contested theories concerning their evolution and relationships. As regards this order, it is
The Birds of Australia (Mathews) London over a 17-year period from 1910 to 1927. The text and plates, comprising 12 volumes, were issued serially in 75 parts in royal quarto format in an edition of 225 numbered copies. The five supplements issued at various times during the long publication period fill a 13th, supplementary, volume; the first three supplements comprising the "Check-List of Australian Birds", and the last two the "Bibliography of the Birds of Australia". When the publication was complete it was reviewed in the RAOU journal "The Emu" by J. A. Leach (as J.A.L.) who wrote: "In these twelve splendid volumes, Mr Mathews