Bison and Calf (IMAGE) Wildlife Conservation Society Caption A bison and calf in Yellowstone National Park. Credit Julie Larsen Maher/Wildlife Conservation Society Usage Restrictions For one-time use for stories directly related to this press release 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.