The common marmoset is a frugivore, but also could be considered a gummivore; it eats exudates when the fruit is scarce during the dry season. This species eats insects for protein. When feeding an adult may give the erh-erh vocalization to deter group members from trying to steal the food (Stevenson and Poole, 1976).
grip pounce: This is when an individual jumps upon an insect prey and lands with the hands flexed around the prey's body (Stevenson and Poole, 1976). The common marmoset then would bite the head before decapitation and discarding the wings and intestines (Stevenson and Poole, 1976).
[Primate Fact Sheets]