Pygmy marmosets use their teeth to gouge holes in trees that secrete gum, or resin—not to be confused with sap, which runs through a tree’s vascular system. The monkeys consume the starchy ...

Marmosets are small, arboreal monkeys of the New World. They live in the tree canopies of tropical forests like the ones in Brazil, where they feed on fruit, insects, and tree sap. They are ...