Tangkoko Batuangus Nature Reserve, Indonesian: Tangkoko-Batuangus Dua Saudara[3][page needed] is a nature reserve in the northern part of Sulawesi island of Indonesia, 70 kilometres (43 miles) from Manado City.

[4] The most common trees in the lowland rainforest of the park are species of the Palaquium genus, Cananga odorata and Dracontomelon dao.

[5] Tangkoko Batuangus Nature Reserve protects at least 127 mammal, 233 bird, and 104 reptile and amphibian species.

[8] Tangkoko Nature Reserve has been a popular destination in North Sulawesi for wildlife watching tourism.

[6] As result of hunting, between 1978 and 1993, the number of crested macaques declined by 75%, maleo birds by 90%, and bear cuscus by 95%.