One of the world’s most endangered primates has been born at Chester Zoo. The rare baby cotton-top tamarin monkey arrived to first time parents Treat (3) and Leo (5), measuring just 10cm from head to tail and weighing a mere 40g. Conservationists at the zoo say they are “overjoyed” at the birth, with cotton-top tamarins listed as. The tamarin monkey is a small monkey native to the Amazon Rainforest. It is the smallest of all monkeys and is also known as the “Giant Monkey”. It can be found in the wild in parts of South America, from southern Brazil to northern Argentina. The tamarin monkey has a long, furry tail that it uses to grasp branches and move around. Facts about Rhesus Monkeys, Baboon, Golden Lion Tamarin, Gibbon, Spider Monkey, and more. They can be very small animals or very large depending on the species. They can get into mischief quickly both in captivity and in their natural environment. ... Hunting by humans and even them being kept as exotic pets have also resulted in many young. When it comes to diet, these monkeys are omnivores. They eat fruits, seeds, buds, and nuts, apart from spiders, insects, small vertebrates, and bird eggs. They are also known as ‘organ grinder’ monkeys, and can be kept as pets only if proper care is taken. They have a tendency to harm humans. In certain places, they are used as service. It has black hands and feet, a reddish-orange tail, and prominent long, white mustaches with or without a beard on the face. Emperor tamarin can reach 9 to 10 inches in length and 7.7 to 32 ounces of weight. Emperor tamarin has a small body, long claws on the feet and a long, thin prehensile tail. Emperor tamarin is an omnivore.