Life Cycle and Young Squirrel monkey females become sexually mature at approximately two and a half years old. Males become sexually mature at four years old. The gestation is about one hundred and forty-two days. The baby clings to the back of the mother from birth. The father of the baby squirrel monkey doesn't help in raising the young, but other mothers with new young will.
Squirrel monkeys give birth to only one monkey.
The weight of the infant is about 112 grams for the males, and 106 grams for females. Very soon after the birth, the baby starts sucking. After twenty days, the baby starts to take some solid food. After a period of six months, the infant is completely weaned. The squirrel monkeys' main enemy is the eagle, because eagles will soar down and pick the monkeys up.