Siamangs are lesser apes. They live on a diet of leaves, fruit, flowers, animal prey and fig seeds. Siamangs main mode of locomotion is brachiation. They live in monogamous couples. The female leads the group and eats faster and longer than the male. After an infant is eight months old, the male carries it instead of the female. Siamangs inflate their large throat sacs for loud, territorial calls. They are diurnal, and obviously, arboreal.