The Black-cheeked ant tanager is a larger bird endemic to the Osa Peninsula of Costa Rica, averaging and 19 cm long. Their head is mostly blackish with a contrasting salmon throat, a dark red iris, a black bill and dark horn legs. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist shrubland, but it is threatened by habitat loss.They feed primarily on insects and other arthropods, but they also eat melastome berries. Their call ia a scolding, paper-tearing noise. They also have a meellow, whistled dawn song with 6-11 phrases.