Risky behavior (IMAGE) Michigan State University Caption Three spotted hyenas surround a lioness. Michigan State University researchers have shown that social bonds between hyenas make the animals more likely to form mobs and attack lions. Credit Brittany Gunther, available under a CC BY 4.0 DEED license. Usage Restrictions Credit must be given to the creator. License CC BY 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.