Mob success (IMAGE) Michigan State University Caption Four spotted hyenas watch a lioness bound away from them into tall grass. Michigan State University researchers have been studying spotted hyena behavior in Kenya for more than 35 years, which enabled the team to discover how these animals’ social interactions and other factors influence their cooperative mobbing behavior. Credit Brittany Gunther 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.