Siamangs vocalize by singing loud, complex hoots, barks, and screams that are amplified by their inflatable throat sac. They live in forests and eat leaves, flowers, and fruits.
- Scientific Name: Symphalangus syndactylus
- Range: Malay peninsula and Sumatra
- Status in the Wild: Endangered
- Location in the Zoo: Wortham World of Primates
- Cool Animal Fact: Vocalize for territorial reinforcement and as a means of reinforcing the bond between a male and female. Calls can be heard as much as a mile through the dense forest.