Neck Glands (IMAGE) Oregon State University Caption Nick glands on this extinct insect preserved in amber appear to release a substance that may have been used to repel predators. Credit (Photo by George Poinar, Jr., courtesy of Oregon State University) 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.