Tracking wild asses (IMAGE) University of Wyoming Caption Saeideh Esmaeili, a recent graduate from UW’s Program in Ecology, tracks onagers, also known as Asiatic wild asses, in Qatrouiyeh National Park in southern Iran. She and other researchers documented that movements of onagers and other members of the horse family are driven by water availability, while movements of small-bodied ruminants are driven by forage quality. Credit R. Shahverdi 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.