Most Sumatran orangutan habitat is protected by Indonesian law. The government has created a very comprehensive system of functional forest categories, and institutions responsible for managing its forests. Some areas remain highly threatened, however, including the Batang Toru Forest (production forest), and the Tripa Swamp Forest (not part of the formal forest estate).
From collection: Orangutans and the Economics of Sustainable Forest Management in Sumatra
Riccardo Pravettoni, UNEP/GRID-Arendal