Callithrix
[2][4] In general, Callithrix and Mico species tend to form larger groups and live within smaller home ranges, thus live in higher population densities, than other callitrichids, but these statistics can vary dramatically among various Callithrix species.Exudates, such as gum and sap, fruit, nectar, and fungi make up the bulk of Callthrix species' diet, but they also eat animal prey such as arthropods, young birds, and small lizards and frogs.They are specialized for exploiting exudates by their elongated, chisel-like lower incisors and a wide jaw gape that allows them to gouge bark of trees that produce gums.The ability of Callithrix species to feed on exudates allows them to survive in areas where fruit is highly seasonal or not readily available.Some species, such as C. jacchus and C. pencillata, have been known to inhabit city parks, backyards, and coconut plantations.