Slug Eater (IMAGE) Penn State Caption This image shows a Chlaenius tricolor, a ground beetle species that eats slugs. The researchers found that slugs transmitted the neonicotinoid insecticide to predatory ground beetles, impairing or killing more than 60 percent of the beetles. Credit Ian Grettenberger, Penn State Usage Restrictions non commercial use only 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.