Weevils (IMAGE) Helmholtz Association Caption Weevils are widely distributed and rich in species. The different, partly exquisitely colored species all have a thorn-shaped extension of their head. Credit Source: Karlsruhe State Museum of Natural History 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.