Plains bison (IMAGE) University of Nebraska-Lincoln Caption Plains bison graze beneath the moon of an Oklahoma sky. A recent analysis of GPS-tracked herds in the state found that the once-endangered mammal responds to temperature and severe drought in ways that should inform its long-term management. Credit Deniz Bertuna / Anthony Cook Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.