The Main Route in September (IMAGE) Research Organization of Information and Systems Caption The main route (gray-colored) followed by the birds during their migration in September, between Okinawa (indicated with the triangle) and the Philippines. Credit Jean-Baptiste Thiebot (NIPR) Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. 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.