Male Copper Jumping Spider (IMAGE) McGill University Caption Insecticides may be more toxic to common spiders than previously thought. Copper jumping spiders play an important role in controlling pests in fields. Credit Crystal Ernst 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.