Adelie Penguin Rookery (IMAGE) National Evolutionary Synthesis Center (NESCent) Caption Adelie penguins breed and raise their chicks in large groups. Credit Photo by Emma Marks 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.