The Small Robber Fly Holcocephala (IMAGE) Cell Press Caption This photograph shows the small robber fly Holcocephala, waiting patiently on a stick until an unsuspecting prey is detected with the help of those highly specialized eyes. Credit Thomas Shahan Usage Restrictions Credit Required. 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.