Capuchin With Katydid (image) Washington University in St. Louis Caption This is a capuchin monkey of the Cebus variety dines on a bright green katydid grasshopper. A steady diet of abundant ripe fruit and leaf-crawling insects may explain why Cebus can't hold a stick to their Sapajus capuchin cousins when it comes to tool usage and other higher-level cognitive skills. Credit A. Melin Usage Restrictions None 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.