Second-Order Motion (IMAGE) Proceedings of the National Academy of Sciences Caption Cues to second-order motion enable mantises to detect prey and subsequently capture them using stereoscopic vision Credit Image courtesy of Vivek Nityananda 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.