The term EARTHBOUND AVIANS refers to birds that are found on Earth. One example of an earthbound avian is the emu, which is a large, flightless bird native to Australia. It is the second-largest living bird by height, after the ostrich. Emus have long necks and legs, and can reach up to 6.2 feet in height and weigh up to 90 pounds. They are known for their fast running ability and can travel great distances at speeds of up to 30 mph.