Common Loon and Chick (image) Wildlife Conservation Society Caption According to a long term study by the Wildlife Conservation Society, the BioDiversity Research Institute, and others, common loons with elevated levels of environmental mercury become sluggish parents, raising fewer chicks to adulthood. Credit Nina Schoch Usage Restrictions One-time usage only. Include the following photo credit: (c) Nina Schoch 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.