Our Siamang, found at Southwick's Zoo in Mendon MA

Where to find the Siamang (besides Southwick's Zoo in Mendon, MA!)
Siamang Facts
Hylobatidae symphalangus syndactylus

Life Span
Wild: 25-30 years
Captivity: 40+years
30-36 inches
Average Weight
17-28 lbs
Group Name
Group Size
Name of Young

Our Siamang, found at Southwick's Zoo in Mendon MAFacts

  • Siamangs are lesser apes like all gibbons and are the largest of the gibbon species. Unlike great apes, they do not build nests because they sleep in an upright position, sitting on the branches.
  • They have a special throat pouch, called a gular sac, that can be inflated to make loud song like calls. Siamangs are the loudest of the gibbons.
  • Siamang calls are legendary. First thing in the morning the adult females will start the territorial hooting while the others join in. Their sounds may be heard as far as 2 miles away.
  • Siamangs may share territory with other gibbons because they are mostly leaf eaters, so they do not need to compete constantly for forest fruits.
  • Their main method of moving through the forest is brachiation. This means they swing in a hand over hand movement.

Did You Know?

Mated siamangs often remain monogamous and live in close family groups.  They usually try to remain within 100 ft of other family members. They also groom each other and often huddle against others in the group.