Flapping of Bat Wing (IMAGE) University of British Columbia Caption When a bat wing flaps, it forms swirling masses of air known as vortex rings Credit University of British Columbia Usage Restrictions With attribution: Credit: University of British Columbia 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.