Parasitic Wasp Attacks Aphid (IMAGE) University of Exeter Caption A parasitic wasp attacks an aphid in the first study to prove the theory that the extinction of one predator can lead to the extinction of another. Credit Dirk Sanders Usage Restrictions For one use only - to accompany this story 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.