Experimental set-up (IMAGE) Frontiers Caption The bee's optomotor response is tested by showing videos of horizontally moving vertical bars to her on two screens, creating the illusion of optic flow. Credit RH Parkinson, C Fecher, and JR Gray 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.