Juvenile prairie rattlesnake (IMAGE) University of Colorado at Boulder Caption A juvenile prairie rattlesnake, one of the focal species in the study, looks out from a rock outcrop near a den site in northern Montana. Credit Credit: Drew Schield Usage Restrictions None License Original 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.