- All white-cheeked gibbons are born with a blond coat matching their mother's coat, a form of camouflage.
- The new male gibbon will retain this light coloring until it begins to turn dusky when he is half a year old.
- By the time he reaches his first birthday, the young gibbon will be sporting a black coat with light cheek patches, like his dad and brother.
- He will retain this coloration for life. Females turn black and then back to blond again, with a small patch of black on their crown, when they reach sexual maturity at around 6 to 8 years of age.