What animal is a large flightless bird that looks like an ostrich related to the emu?

The animal that is a large flightless bird that looks like an ostrich related to the emu is the cassowary. Cassowaries are native to the tropical forests of New Guinea and northeastern Australia. They are the third-largest birds in the world, after ostriches and emus. Cassowaries have distinctive blue and red skin on their heads and necks and long, powerful legs. They are known for their aggressive behavior and have been known to attack people who come too close.