Lasius niger - fighting workers (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Fighting workers of the ant species Lasius niger: The ant in the middle is from a different colony and is attacked by the other workers. Credit photo/©: Florian Menzel Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.