Siamang

Share Top Five March 22, 2019

The siamang (Symphalangus syndactylus) is an arboreal black-furred gibbon native to the forests of Indonesia, Malaysia and Thailand. The largest of the gibbons, the siamang can be twice the size of other gibbons, reaching 1 m in height, and weighing up to 14 kg. The siamang is the only species in the genus Symphalangus,More info:wiki

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#10 Siamang Symphalangus syndactylus,More info:animals.sandiegozoo

Kings (and queens) of swing: Siamangs have slender bodies and lightweight bones for some serious swinging. The largest and darkest of the lesser (meaning smaller) apes, also known as gibbons, siamangs are well suited for life in a forest’s treetops. Yet there are some features of their hands and feet that make siamangs different from their gibbon brethren.

Siamang hands and feet are a lot like ours. They have four long fingers and a smaller opposable thumb on their hands, and their feet have five toes like we have, but their big toe is opposable, too. The opposable thumb and toe is lacking in other members of the gibbon family. Siamangs can grasp and carry things with BOTH their hands and their feet. One other thing that sets the siamang apart physically from other gibbons is webbing between their second and third toes.

#9 Siamang,More info:nationalzoo

Males, females and infants have long, shaggy black coats with pale hairs around the mouth and chin. Males have a longish tuft of hair in the genital region. Siamangs have a grayish or pinkish throat sac, which they inflate during vocalizations. The throat sac can become as large as a grapefruit. Their arms are longer than the legs of the white-cheeked gibbon, and their hands and feet are broader. The arm length may reach two and a half times the length of the body. The primates have slight webbing between their second and third toes. Both sexes have long canine teeth, opposable thumbs and a great toe that is deeply separated from the other toes. Like other primates, siamangs have a highly developed brain.

When on the ground, siamangs are usually bipedal, moving on their two legs. In the trees, they move by acrobatic hand-over-hand swinging through the branches, a process called brachiating. When moving slowly, they swing much like a pendulum as they grab one branch and release it before grabbing the next, so that the body is freely projected through the air. Flights of 25 to 32 feet (8 to 10 meters) have been witnessed. The heavier and larger siamangs, however, travel more slowly than the white-cheeked gibbons.