(. (IMAGE) Radboud University Nijmegen Caption The average weight of trapped insects per day against the years 1989 until 2016. After 27 years, the total average weight has been declined by more than 75 percent. Credit Radboud 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.