White-Naped Crane (IMAGE) Wildlife Conservation Society Caption A new study by WCS (Wildlife Conservation Society) says that breeding populations of white-naped cranes have decreased by 60 percent in Ulz River basin -- an important stronghold for the species in Eastern Mongolia. Credit Julie Larsen Maher/WCS 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.