They move and feed mainly in the upper and middle levels of the canopy and almost never come down to the ground. Families often feed together in trees.
Like all gibbons, White-cheeked gibbons live in small, monogamous families composed of a mated pair and up to four offspring. They are physically independent at about three, mature about six and usually leave the family group at about eight, though they may spend up to ten years in their family group. The White-cheeked gibbon has extremely long arms and legs. The male is black and the female is a cream colour. They have patches of lighter fur on their cheeks, though this is hard to distinguish on the female.