The sayaca tanager (Thraupis sayaca) is a species of bird in the family Thraupidae, the tanagers. It is a common resident in northeastern, central, and southeastern Brazil (Portuguese: sanhaço [sɐ̃ˈɲasu] or sanhaçu [sɐ̃ɲaˈsu]), and Bolivia, Paraguay, Uruguay, and northeastern Argentina (where they are known as celestinos or celestinas). A few are recorded from far southeastern Peru, but its status there is unclear, in part due to the potential of confusion with the very similar juveniles of the blue-grey tanager.