The term 'CASSOWARY's Cousin' refers to three different species of large flightless birds. The first is the EMU, which is native to Australia and is the second-largest living bird by height. The second is the RHEA, which is native to South America and is the largest bird in the Americas. The third is the Emeu, which is native to New Caledonia and is the only member of its genus. All three species are closely related and share many characteristics, such as long legs, powerful claws, and a long neck.