WIDODO Ramono is disturbed. The head of the Indonesian Rhinoceros Foundation is restless thinking about the fate of the wildlife which is increasingly difficult to find in its natural habitat at the Bukit Barisan Selatan National Park. Already endangered by wildlife hunting and shrinking habitat, Sumatran rhinos (Dicerorhinus sumatrensis) now face a new threat which is no less deadly: mantangan.

Mantangan (Merremia peltata) is a vine-like tubero