Macaques are medium-sized monkeys. Their tails are very short and hard to see so this can sometimes lead people to think they are apes (which do not have a tail), but this is not true! Males can easily be distinguished from females as they are almost double in size and weigh up to 10kg. Their bodies are covered in black, shiny hair except for their bottoms which are pink in colour. Sulawesi crested macaques are very social animals so don’t be surprised to see them grooming one another which helps maintain strong bonds between troupe members.
When females come into oestrus their bottoms become swollen and reddish in colour. This lets the males know she is ready to mate. One infant will be born after a gestation (pregnancy length) of between 5-6 months.
The population of Sulawesi crested macaques has suffered severe declines in numbers in recent decades and has lost up to 80% of its population. Unfortunately, this decline continues today and is attributed to ongoing habitat loss and illegal hunting.