Mongooses Grooming (IMAGE) University of Bristol Caption Dwarf mongooses reward individuals who perform cooperative sentinel behaviour (acting as a raised guard) by grooming them when they return to the burrow in the evening. Credit Megan Shersby Usage Restrictions None 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.