Ruddy turnstone (IMAGE) University of Helsinki Caption The ruddy turnstone (Arenaria interpres) is a marine wader bird, here pictured on a seashore occupied by human settlement at Whitby, UK. Credit Petri Niemelä Usage Restrictions None License Original 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.