Squirrel monkeys primarily feed on fruits, nuts, flowers, insects, bird eggs, spiders, lizards, and other small animals. They have deeply grooved incisors that assist them in cracking open tough fruits and nuts.
They also eat mushrooms, buds, and leafy greens to supplement their diet. Overall, these monkeys are omnivorous and will take advantage of any food source available to them. The main part of a squirrel monkey’s diet consists of fruits, nuts, insects, and other small animals.