BTS (IMAGE) Dickinson College Caption The invasive and elusive Brown Treesnake has contributed to the loss of 12 of Guam's 13 native forest species and has caused millions of dollars of infrastructure damage on the island. Credit Dickinson College Usage Restrictions Credit Dickinson College 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.