Nectar and Gum: They extract nectar, sap, and tree gum by chewing on plant material to supplement their diet.
Insects: Occasionally, insects, such as spiders, crickets, and even moths, form a small part of their dietary intake. This provides them with additional dietary proteins.
Vegetables and Leaves: To a lesser extent, finger monkeys eat certain greens, such as young leaves, shoots, and even occasionally, flowers. The nutritional contribution from plants remains secondary to fruits in their diet.
Note: When kept in captivity, finger monkeys are usually offered formulated primate diets tailored to their nutritional needs, often combining various fruits, veggies, and other components according to species-specific diets.