Arctic Terns (IMAGE) Queen's University Caption Arctic terns have the longest yearly migration of any bird species, with some individuals covering 80,000 km annually. Metals and other contaminants accumulated over their long journeys are ultimately deposited near their nesting sites, in some instances to toxic concentrations. Credit Mark Mallory Usage Restrictions None 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.