The eastern gray gibbon[2], also known as the northern gray gibbon, is a primate in the gibbon family, Hylobatidae.
- Eastern gray gibbons have light brown fur that fades to black on the face, chest, and inner arms, with a white border around the face.
- They have padded buttocks and pronounced canines, and the base of the thumb starts at the wrist rather than the palm of the hand, allowing them a wide range of motion.
- However, this limits their ability to grasp small objects. Like all the great apes, these gibbons do not have a tail.
- Instead, among their most distinctive features are their very long arms, especially the elongated ulna and radial bones of the forearms.
- This trait, along with many other small skeletal changes, tailors the species to its method of movement: brachiation.
