The crossword solution for the term 'Sizable Bird' is EMU, a three letter word. The EMU is the second-largest living bird by height, after its ratite relative, the ostrich. Native to Australia, the EMU is a flightless bird with long legs and a long neck. It has a shaggy grey-brown coat of feathers and can reach up to 6.2 feet in height. The EMU is an important cultural icon of Australia and is featured on the Australian coat of arms.