Comparison of Leaves (image) Max Planck Institute for Chemical Ecology Caption Leaves of Acacia hindsii plants colonized by mutualistic (left) or parasitic ants (right). Plants associated with the mutualistic ant species Pseudomyrmex ferrugineus are visibly healthier than their neighbors. Credit Marcia González-Teuber / Max Planck Institute for Chemical Ecology Usage Restrictions None 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.