Guillemot Eggshells (2 of 3) (IMAGE) Society for Experimental Biology Caption The structure of the guillemot eggshells is unique even among closely related species such as puffins. Credit Steven Portugal and James Bowen 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.