Ants Tambopata Rainy Season (IMAGE) Wiley Caption This is an example of a leaf from an invasive species being pinned to a host tree to provoke the defense reaction of the ants. Credit Dr. Tiffany Weir 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.