Caterpillar (IMAGE) Florida Museum of Natural History Caption Erythrina stem borer larvae have a naturally pale color, but those that consume toxic Erythrina seeds in the spring have a pinkish hue and turn bright red before leaving the pod to pupate, possibly a visual cue of chemical defenses. Credit Andrei Sourakov 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.