Scientific name:
Hylobates syndactylus

Natural spread:
Malaysia, Indonesia

with this gibbon is it about the biggest long-arm-monkey-type, that heavily until 11 kg and standing approximately 80 cm big becomes. The head-torso-length amounts to approximately 60 cm on that occasion. its Greek epithet (syndactylus = "this at the fingers of growing together") refers to the together deformed ones in 2. and 3. Toes. its fur is colored brilliantly black except for one gray beard and rather long-haired. Also the scrotum carries especially long hair while the throat is decorated with a bare skin-sack, that expands when calling until over head-size and serves as resonance-organ.

Chants The Siamangs execute an intent concert in deep, bell-purely sounding sounds of the males, that the females and children join in its higher voice-situations soon, every morning. With such concerts, that present also other gibbon-types, it is conveyed the neighbor-troops of acoustic information, that reports about the property of the respective territory. The quieter group usually leaves step forward to this the more loudly singing one to popular feed-trees and water-places. Some troops vary its lute through rhythmic palpitation with the hand on the Kehlsack or the mouth and produce such a true tremolo. Beside this substantial and vital function, the gibbon-chants seem to be also expression of zest for life and well-being, because in bad weather, these concerts usually stop.

Way of life Siamangs live in the moist mountain-forests as far as in heights of approximately 2000 m and are above all on Sumatra at home. they usually move hangelnd for itself in the different, floor-nicely sorted leaf-roofs of a tropics-jungle, but also on thick branches striding and at escape continuously onward. Siamangs are less jump-joyful as the smaller real gibbons. Is on such branches of taking place energy-flights no rarity from the run over distances of 12 m after all. At escape, the contact-time is shorter than this in the respective flight-energies at the branches spent, so that hardly any persecutor can then keep up.

These giant-gibbons can cross water-runs, with what they apply a type Bruststil, swimming.

Endangering Through the increasing destruction of the habitats, Siamangs are endangered in its continuance. By the Washingtoner Artenschutzübereinkommen, the type is put under protection.

Mop of hair-gibbon (Hylobates concolor)) it carries an alongside-directional mop of hair, that is less clearly distinctive with the females, on the head. It is according to origin, from the Chinese island Hainan until Siam, Laos and Taiwan, brown until black colored forest-inhabitants with differently-colored beards and hair-caps. Also these gibbons possess resonance-powerful Kehlsäcke. Nothing known almost is from its homestead-life.