No matter the species, human or otherwise, it's tough being a parent. In honor of Fathers' Day, take a moment to get acquainted with some of the animal world's best dads.
With a baby face like that, it's probably not hard for a father tamarin to love his offspring.
Marmosets and tamarins, small monkeys in the subfamily Callitrichinae are native to the Amazon rainforests and are known for being good helpers for mothers.
Females generally give birth twice a year to twins and it's the dad's job to care for the young while the mother recuperates.
Tamarin fathers, such as the one pictured above, are known to carry their young around on their back and bring them to the mother for feeding.