The existence of the Sumatran tiger (Panthera tigris sumatrae) depends ultimately on the abundance of its potential preys in its remaining natural habitats. Yet, little is known about it in almost all areas where the presence of the big cat has been positively confirmed, such as in Bukit Rimbang-Bukit Baling Wildlife Reserve in Riau Province. The objectives of the present study were: (1) to exp…