Tiger (IMAGE) Wildlife Conservation Society Caption Researchers found that forest fragments outside of Sumatra's Bukit Barisan National Park were surprisingly rich in wildlife -- including critically endangered species such as Sumatran tiger (Panthera tigris sumatrae). Credit WCS Usage Restrictions for one-time use only for stories related to this study. 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.