The orangutan is endemic to the tropical forests of Indonesia, and three species have been described: the Sumatran orangutan, the Bornean orangutan and the Tapanuli orangutan, which was only discovered in 2017. Arboreal, it spends most of its time in trees in search of food: flowers, leaves, insects, bark and fruit. These animals play an important role in the dissemination of seeds. Like us, it belongs to the group of great apes. In fact, we share more than 96% of our genetic heritage. The young remain with their mother until they are 8 or 9 years old, to acquire all the knowledge they need to survive. There is a strong sexual dimorphism, with the male being more corpulent and having thicker fur that acts as armour, like the lion’s mane. It also acquires a face mask and a laryngeal sac at around 15 years of age during puberty.