Range. What do they eat? Omnivore; mostly fruits and leaves but will also consume insects, bird eggs and small invertebrates. Endangered. Symphalangus syndactylus. Their calls establish territory and reinforce the bond between a male and female. Sumatra Island to Malaysia. Cool Animal Fact. Scientific name i: Symphalangus syndactylus: Taxonomy navigation › Symphalangus. SCIENTIFIC NAME: Symphalangus syndactylus. These are known as ischial callosities and help the siamang have a more comfortable night sleeping in the tree branches safe from predators. This is an easy way to tell the difference between monkeys and apes. These “webbed” toes are one of the main features to identify siamangs. Malay peninsula and Sumatra. Status. Siamang are larger than their gibbon relatives. Calls can be heard as much as a mile through the dense forest. Siamangs are apes and like all apes, including chimpanzees and gorillas, they do not have a tail. The Symphalangus genus contains one species, siamang gibbons. Range. Gibbon Appearance. As an ape the siamang does not have a tail. SIAMANG. Siamang Gibbons Scientific Name. Wortham World of Primates. Estimated Population Size: 100,000 - 200,000 Biggest Threat: Habitat loss Most Distinctive Feature: Dexterous hands and feet and complex communication Other Name(s): Common Chimpanzee Gestation Period: 8 months Habitat: Tropical forest and woody savanna The scientific name of siamangs, Symphalangus, originates from the Greek words “sum” and “phalanx” that mean together and finger respectively. The second and third toes of siamangs are joined by skin. Location in the Zoo. Symphalangus syndactylus. Siamang. The average length of the siamang is 75 to 90 cms (29.5 to 35.5 in) from their head to rump and the average weight is 8 to 13 kgs (17 to 28 pounds). Diet Habitats. Scientific Name: Symphalangus syndactylus. The species of crested gibbons, whose scientific name is Nomascus, consists of the Northern buff-cheeked, Black-crested, Eastern black-crested, Hainan black-crested, Northern white-cheeked, Southern white-cheeked, and Yellow-cheeked gibbon. HABITAT: Rainforest with home range up to 100 acre tracts of Sumatra and Malaysia . This webbing provides the siamang with its scientific name, Symphalangus syndactylus, which translates from Ancient Greek to “together phalanx” + “united finger.” The siamang’s body is perfectly adapted to a life of swinging from branch to branch (also known as brachiation). Conservation Threats. Scientific Name. CONSERVATION STATUS: Endangered . These are light, agile apes. Prey: Fruits, Seeds, Insects Name Of Young: Infant Group Behavior: Group Fun Fact: Has 32 teeth including fang-like canines! Forests.