It consists of swamp forest and lowland rain forest, mostly of secondary growth as result of extensive logging in the 1960s and 1970s. Despite decreasing populations, the park still has a few critically endangered Sumatran Tigers, Sumatran Elephants and Sumatran Rhinoceroses. It also provides excellent birdwatching,Paul Jepson (1997) Fielding's birding Indonesia (Periplus Editions) ISBN 1-56952-133-6 with the rare White-winged Wood Duck among the over 400 species present in the park.
Threats to the park are posed by poaching and habitat loss due to illegal logging. Conservation efforts include patrolling and the establishment of the Sumatran Rhino Sanctuary and the Elephant Conservation Centre.