Albatrosses are among the largest of flying birds, and the great albatrosses (genusDiomedea) have the largest wingspans of any extant birds, reaching up to 12 feet (3.7 m). Albatrosses are highly efficient in the air, using dynamic soaring and slope soaring to cover great distances with little exertion. They feed on squid, fish and krill by either scavenging, surface seizing or diving.