Crows Help (IMAGE) University of Exeter Caption Crows are performing a useful function and keeping our environment free from rotting carcasses, research carried out at the University of Exeter in Cornwall has discovered. Credit Richard Inger Usage Restrictions Please credit as above 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.