Sanje Mangabey (IMAGE) Wildlife Conservation Society Caption The new study that ranks Tanzania's most threatened primates shows the third most vulnerable is the "endangered" sanje mangabey, threatened by direct hunting and habitat destruction, especially in unmanaged forests. Credit Tim Davenport/WCS. Usage Restrictions for one time use only for breaking news 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.