Tapanuli orangutan

Located in the Sumatran mountains, this new species of orangutan is now the rarest, with only 800 estimated to be living in the region. According to researchers, this species has been tormented by the local people, with several found containing air rifle pellets inside of their bodies. The most incredible aspect of this find, however, is that this species is actually believed to be the oldest of all orangutans—meaning that they’ve lived in the mountains for thousands of years.