The emperor tamarin, also known as the Brockway monkey, is a species of tamarin allegedly named for its resemblance to the German emperor Wilhelm II. It lives in the southwest Amazon Basin, in east Peru, north Bolivia and in the west Brazilian states of Acre and Amazonas. The fur of the emperor tamarin is predominantly grey colored, with yellowish speckles on its chest. The hands and feet are black and the tail is brown. Outstanding is its long, white mustache, which extends to both sides beyond the shoulders. The animal reaches a length of 23–26 centimetres (9–10 in), plus a 35–41.5 cm (13.8–16.3 in) long tail.[4] It weighs approximately 500 grams (18 oz).






Howler monkeys have short snouts and wide-set, round nostrils. Their noses are very keen, and the Howler monkey can smell out its food (primarily fruit and nuts) up to 2km away. Their noses are usually roundish snout-type, and the nostrils have many sensory hairs growing from the interior. They range in size from 56 to 92 cm (22 to 36 in), excluding their tails, which can be equally as long, in fact in some cases the tail has been found to be almost 5 times the body length.








The golden lion tamarin gets its name from its bright reddish orange pelage and the extra long hairs around the face and ears which give it a distinctive mane. Its face is dark and hairless. It is believed that the tamarin gets its hair color from sunlight and carotenoids in its food. The golden lion tamarin is the largest of the callitrichines. It is typically around 261 mm (10.3 in) and weighs around 620 g (1.37 lb). There is almost no size difference between males and females.








Spectacled Langur, also known as Dusky Langur, Dusky Leaf Monkey or Spectacled Leaf Monkey, is one of the most common monkeys found in Khao Sok National Park. Spectacled Langurs are often seen on treetops on early mornings or late afternoons feasting on fresh leaves and fruit. Best place in Khao Sok to see them is Cheow Larn Lake, but if you are lucky and start your trek early, you can also see them along the treks leaving from the National Park main head quarters. They have very long tails and therefore are easy to distinct from other monkey species living in the same area. The name Langur comes from Hindu word for long-tailed.






Spider monkeys (of several species) live in the tropical rain forests of Central and South America and occur as far north as Mexico. They have long, lanky arms and prehensile (gripping) tails that enable them to move gracefully from branch to branch and tree to tree. These nimble monkeys spend most of their time aloft, and maintain a powerful grip on branches even though they have no thumbs.









The Squirrel Monkey is a small species of New World Monkey that is natively found in the forests and tropical jungles of Central and South America. Measuring as little as 25cm from the top of the head to the base of their tail, these tiny primates are more than double that size when including their long tail. Unlike a number of other small monkey species, the tail of the Squirrel Monkey is not prehensile which means that it cannot be used to grip onto branches. Instead, their long tail is used to help the Squirrel Monkey to balance when climbing about on the high branches.