The Celebes Crested Macaque (Macaca nigra), also known as the Crested Black Macaque, Sulawesi Crested Macaque, or the Black "Ape". Tangkoko DuaSudara Nature Reserve. We had a group of about 100 walk right by us.. This is another Sulawesi endemic species. It comes quite close to humans but when it opens it mouth can show very large teeth. There are warnings at the park gate to not get into staring contests with them.. If you kneel they feel less threatened. Communication consists of various sounds and gestures; such as the presentation of the long eyeteeth while grimacing a clear threatening gesture. Because it devastates crops and fields, the Celebes Crested Macaque is hunted as a pest. It is also hunted to provide bushmeat. Clearing the rain forests further threatens its survival. Its situation on the small neighbouring islands of Sulawesi (such as Bacan) is somewhat better, since these have a low human population. The total population of the macaque on Sulawesi is estimated at 4,000-6,000, while a booming population of up to 100,000 monkeys is found on Bacan.