Indonesia is one of the most biologically diverse nations on Earth. Straddling the equator across thousands of islands, it holds rainforests, coral seas and volcanic highlands that shelter creatures found nowhere else. At the emotional centre of this natural richness stands the orangutan, the only great ape native to Asia and one of humanity's closest living relatives.
The Orangutan: A Forest Person in Peril
The name orangutan comes from Malay words meaning person of the forest, and anyone who watches one move through the canopy understands why. There are three species, all critically endangered: the Bornean orangutan, the Sumatran orangutan and the Tapanuli orangutan, a distinct population in northern Sumatra recognised as a separate species only in 2017. Slow-moving, intelligent and largely solitary, orangutans spend most of their lives in the trees, building fresh leaf nests each night and feeding on fruit, bark and leaves.
Their survival is under intense pressure. Deforestation for timber, agriculture and above all palm oil plantations has fragmented and destroyed vast areas of habitat. Where forest is cleared, orangutans lose both food and shelter, and their slow reproduction, with females raising a single young for years, makes recovery difficult. Responsible ecotourism has become an important ally, giving these forests economic value while funding conservation.
Tanjung Puting: River Journeys in Borneo
On the island of Borneo, in Central Kalimantan, Tanjung Puting National Park is one of the finest places in the world to see wild and rehabilitated orangutans. Visitors travel aboard a klotok, a traditional wooden riverboat, drifting slowly up the tannin-dark Sekonyer River. Nights are spent sleeping on deck under the stars, lulled by the sounds of the jungle.
The park is home to Camp Leakey, a research and rehabilitation centre established in the 1970s to study orangutans and return rescued animals to the wild. At feeding platforms, orangutans emerge from the forest to be observed at close but respectful distances. Proboscis monkeys, gibbons, hornbills and crocodiles complete the scene along the riverbanks.
Bukit Lawang and the Forests of Sumatra
On Sumatra, the village of Bukit Lawang sits at the edge of Gunung Leuser National Park, part of a vast rainforest that is one of the last places where orangutans, tigers, elephants and rhinos still share the same ecosystem. Guided jungle treks here offer the chance to encounter semi-wild orangutans among towering trees, along with Thomas leaf monkeys and a chorus of birds and insects.
Beyond the Apes: Indonesia's Rare Giants
Indonesia's wildlife extends far beyond the orangutan. Several of its species are among the rarest on the planet.
- The Sumatran tiger is the smallest surviving tiger subspecies and critically endangered, clinging to fragments of forest.
- The Javan rhinoceros, one of the rarest large mammals on Earth, survives only in Ujung Kulon National Park at Java's western tip, numbering just a few dozen animals.
- The Sumatran elephant, a smaller forest elephant, faces habitat loss and conflict with expanding farmland.
- The Komodo dragon, the world's largest lizard, roams the dry islands of Komodo and Rinca in the east.
Birds of Paradise and the Forests of Papua
In the far east, the island of New Guinea, shared with Papua New Guinea, hosts the spectacular birds of paradise. These birds are famous for the extravagant plumage and elaborate courtship dances of the males, performed on forest display grounds. Papua's remote rainforests remain among the least explored on Earth and are a magnet for dedicated birdwatchers.
National Parks and Responsible Ecotourism
From the seas of Komodo to the peat forests of Kalimantan, Indonesia's network of national parks protects this heritage. Travellers can help by choosing licensed guides, keeping a respectful distance from wild animals, never feeding them by hand, and supporting operators that reinvest in conservation and local communities. Seen this way, a wildlife journey through Indonesia is not only unforgettable, it is part of keeping these species alive for the future.