Arctic terns hold the record for the longest migration of any animal in the world, annually making the journey from the Arctic Circle to the Antarctic Circle. One particularly committed tern made the trip in nearly 60,000 miles, or more than twice the circumference of the planet. Terns rack up all those miles by meandering across oceans and continents rather than flying directly north or south. Source: https://www.nationalgeographic.com/animals/birds/a/arctic-tern/