Rissa tridactyla (IMAGE) University of Barcelona Caption En las regiones árticas, el período de tiempo con condiciones óptimas para la reproducción de las aves marinas es muy reducido. Credit Sébastien Descamps Usage Restrictions The image may only be used with appropriate caption or 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.