Like other Tangara, the diet of the Green-headed Tanager is a mixture of fruits and insects (Isler and Isler 1987). Insects taken include ants and caterpillars and other larvae. Fruits taken include those of Allophyllus edulis, Hamelia, Urtica, and bromeliads. In addition, will also eat cultivated fruits such as oranges, bananas, figs, papayas, and will visit feeding trays (Isler and Isler 1987). In a study by Oniki et al. (1994), the Green-headed Tanager was one of the most common species observed foraging on catkins in Cercropia trees in Espirito Santo State, Brazil. Isler and Isler (1987) report the contents of 6 stomachs: 5 contained only vegetable matter and 1 contained only animal matter.