* Marmosets: These small New World monkeys are known for their specialized diet of insects, especially tree sap. They have sharp claws and teeth well-suited for extracting insects from crevices and holes.
* Tamarins: Similar to marmosets, tamarins are small New World monkeys that often supplement their diet with insects.
* Bushbabies: These nocturnal primates are not technically monkeys, but they are closely related. They are primarily insectivorous, but also eat fruits, gums, and small vertebrates.
* Tarsiers: These nocturnal primates are also not monkeys, but they are known for their large eyes and insect-catching prowess.
It's important to note that even these "insectivore" monkeys may occasionally eat other foods like fruits or small vertebrates.
Overall, insectivory is not a common dietary strategy among monkeys, but some species have adapted to specialize in this niche.