The Pygmy Marmoset (Callithrix pygmaea) is the smallest monkey in the world (13 - 17 cm, head and body length) and lives in South America, in Peru, western Brazil, Ecuador and south-east Colombia. The have specially adapted claws for climbing trees. Pygmy marmosets are omnivorous, their diet consists of insects, spiders, small reptiles, fruits, leaves and tree sap. About 2/3 of their time they are removing tree bark to reach the sap. They live in groups in the trees and are very active creatures, swiftly running and jumping in the trees. Due to habitat loss, the Pygmy marmoset may become threatened.