Pygmy marmosets, the smallest monkeys in the world, protect themselves by hiding among the rainforest plants and by dashing and leaping from danger. In addition, they have coloration that camouflages them from predators.

Pygmy marmosets, whose bodies grow only about 6-inches long, have black and brown stripes on their orange-brown bodies, which blend in with the light and shadows of their habitat. To avoid their main predators, birds of prey such as hawks and harpy eagles, they keep to the lower levels of the forest. To help them spot danger, they have flexible necks which enable their heads to turn 180 degrees. To avoid raptors and other predators such as cats and snakes, they have the ability to move very quickly and leap more than 16 feet from one branch to another.

Pygmy marmosets live in social groups of up to nine members, which further protects them, as all the members keep watch for danger. They have an intricate system of chattering in varying frequencies to communicate with each other. To protect the new babies when they are first born, Pygmy marmoset fathers carry them around piggyback for a few weeks. When the young ones have grown a bit, they hide while the rest of the group forages for food.