A flock of mainly white-rumped sandpipers (IMAGE) Cell Press Caption A flock of mainly white-rumped sandpipers (Calidris fuscicollis), a long-distance migratory shorebird, which may benefit from being lighter colored to avoid overheating during migration. Credit Pablo F. Petracci Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.