Way Kambas National Park
The park has 50 species of mammal many of them critically endangered. There are about 20 Sumatran rhinoceros in the area, down from around 40 in the 1990s. The number of Sumatran elephants in the park was estimated to 180 in 2005. The population of Sumatran tigers has declined from 36-40 in 2000 to less than 30. Other mammals in the park are the Malayan tapir, Sumatran dhole (Cuon alpinus sumatrensis) and siamang (Hylobates syndactylus syndactylus).