The main diet of Green-throated Tanager consists of a majority of fruits (69%), supplemented by arthropods (31%), a similar diet to most species in the genus Tangara (Naoki 2003). The stomach contents of one bird consisted of strictly small berries (Isler and Isler 1987). T. argyrofenges forages in trees of the genus Cecropia eating their catkins or hanging flowers, and foraging within their leaves, bark, and slender branches (Parker data, cited in Isler and Isler 1987). Foraging occurs most commonly in the mid to upper level of trees, or canopy, staying well hidden, as well as supplementary foraging in epiphytic shrubs found in secondary growth on the outskirts of tropical forests (Skutch 1989, Parker et al. 1996).