Gibbons know how to wake up the neighborhood! They start the morning with loud songs that probably serve to defend resources such as territories, food trees, and partners. The songs may also help to attract potential mates.
Gibbons have really long arms and legs to help them move through the trees using a special form of travel called brachiation. They hang from their arms and swing from branch to branch just like you might do on a playground's monkey bars. This way, they can move through the trees quickly and can jump far. When walking on branches or on the ground, gibbons use their legs (bipedalism), while often using their arms for balance.
Adult male red-cheeked gibbons are black with small, pale yellow or pale orange cheeks. Males also have a group of stiff hairs that stand straight up (a crest) on the top of their heads. Females look very different: bright yellow or pale orange with a black patch on the top of the head. When a red-cheeked gibbon is born, no matter if its a boy or a girl, its coat is a bright yellow color to match its mother. The color changes to black like the adult males within a few months; only the cheek patches remain yellow. Females turn back to the yellow coloration when they mature.