It acts a resonating chamber for the vocal cords, making the sounds even louder. This sac can be inflated to be as big as the siamang's head. The siamang, unlike other gibbons, has an inflatable throat sac. The inflatable throat sac makes the siamangs the loudest of all the gibbons. This sac makes their calls louder! Both males and females have a throat sac. Unlike other gibbons, siamangs have a throat sac (also called a gular sac) which they can inflate to be about the size of their head. They sleep sitting upright, resting on tough pads located on their rear ends (these pads are called ischial callosities). ![]() Unlike other apes, siamangs and gibbons do not make "sleeping nests." They simply sleep (alone or with a few individuals huddled together) in a fork between branches. Like other apes, siamangs groom one another (they clean the hair of a family member using their fingers). They live in small, stable family groups consisting of a mated pair (a male and a female who mate for life) and their immature offspring (juveniles, siamangs less than 7 years old). Siamangs are social animals that are active during the day (they are diurnal). Often they drink by dipping a furry hand into the water or rubbing a hand on wet leaves, and then slurping up the water from their fur. Siamangs, like other gibbons, drink water. They also eat insects, spiders, bird eggs, and small birds. They forage for food in the forests during the day, eating fruit (which constitutes about 75% of their diet), leaves, flowers, seeds, tree bark, and tender plant shoots. Siamangs are omnivores (eating plants and small animals). Siamangs are the biggest type of gibbon and are the largest of the lesser apes. Siamangs have a reach of about 5 feet (1.5 m). Males are about 3 ft (90 cm) long and weigh about 15 pounds (7 kg). Male siamangs are slightly larger than the females. Unlike other gibbons, siamangs have webbing between the 2nd and 3rd toes. When they swing through the trees (called brachiating), they use four fingers of their hands like a hook (but they do not use the thumb for this). Siamangs can grasp and carry things with both their hands and their feet. ![]() Their feet have five toes, including an opposable big toe. Siamangs' hands are very much like ours they have four long fingers plus a smaller opposable thumb. They have dark eyes, small nostrils, and jet-black skin. Siamangs have an almost hairless face they have a slight mustache and beard. Siamangs have senses very similar to ours, including hearing, sight (including color vision), smell, taste, and touch. Siamangs are covered with long, dense, shaggy, black hair on most of their body (except their face, fingers, palms, armpits, and bottoms of their feet). ![]() Siamangs, like all gibbons, have lightweight bones. They have a small, round head, very long arms (the arms are longer than the legs), and a short, slender body. Because of the rapid deforestation of their habitats, gibbons are an endangered species. The siamang is the largest, darkest, and noisiest species of gibbon. The siamang is one of nine species of gibbons. Because they are so dextrous while moving in the trees, almost no predators can catch them. Siamangs are arboreal they spend most of their lives in trees. These very acrobatic primates live in southeast Asia. Siamangs are rare, small, slender, long-armed, tree-dwelling (lesser) apes. The siamang is the largest and darkest species of gibbon. Today's featured page: Axis Tilt and Earth's Seasons is a user-supported site.Īs a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
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