The bird family Casuariidae has four surving members: the three species of cassowary, and the only remaining species of emu. The emus were formerly classified in their own family, Dromaiidae, but are regarded as sufficiently closely related to the cassowaries to be part of the same family.
All four members of the family are very large flightless birds native to Australia-New Guinea. The characteristics of the family are those of its members.
