Arctic Tern with GPS tag (IMAGE) University of Washington Caption This Arctic tern has been outfitted with a GPS tag in Iceland to track its movements by satellite. This species has the longest migration in the world, traveling from Iceland to Antarctica and back in a single year. Credit Sara Maxwell/University of Washington Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.