Male Siamang Skull BC-290
5" L x 4" W x 3 ½" H 13.1L x 9.7W x 8.5H (cm)
Siamangs, the largest of the gibbons, live in Sumatra and Malaysia. These apes are almost exclusively arboreal, displaying "suspensory" behavior. Siamangs have opposable big toes, which allow them to grasp branches with their feet when walking upright along them. They also travel through the trees swinging from tree limb to limb, covering more than 30 feet with a single swing. One difference between siamangs and other gibbons is its enormous throat sac, which can inflate to a size equivalent almost to the size of its head. 2-part skull (separate cranium & jaw).