Running Bird is a term used to describe two species of birds, the OSTRICH and the EMU. The OSTRICH is the largest living bird in the world, with a height of up to 2.7 meters and a weight of up to 156 kilograms. It is native to Africa and the Middle East and is known for its long neck and powerful legs. The EMU is the second-largest living bird in the world, with a height of up to 1.9 meters and a weight of up to 45 kilograms. It is native to Australia and is known for its long legs and ability to run quickly. Both the OSTRICH and the EMU are flightless birds, but they are able to run at great speeds.