Tersina is a genus of tanager.

It contains a single species, the swallow tanager (Tersina viridis) . It is found widely throughout South America, from eastern Panama to far northern Argentina.

The species is somewhat dimorphic, as the female is a yellow-green, and the male a brighter light emerald-green, with a small deep black face and upper throat patch.

This bird was seen for the fist time in Cerro Colorado, a Natural and Cultural Reserve, which together with the Cuevas de las Manos in Santa Cruz, forms one of the most outstanding pictorial centers of rock art in the country.