The term 'bird related to a cassowary' can be summarized as an EMU, which is a three-letter word. The EMU is a large, flightless bird native to Australia and the second-largest living bird by height after the ostrich. It is closely related to the cassowary, and is the only extant member of the genus Dromaius. The EMU is an important cultural icon of Australia, appearing on the coat of arms and various coins.