Monarch Butterfly Caterpillars (IMAGE) Florida Atlantic University Caption When food is scarce, monarch butterfly caterpillars go from docile to domineering. Credit Florida Atlantic University Usage Restrictions Credit: Florida Atlantic University 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.