Argentina. Region Norte: Catamarca, Jujuy, Salta, Santiago del Estero, Tucumán

The Northwest Region of Argentina (NOA) is one of the ecological regions into which the Argentine North is divided. It occupies the provinces of Catamarca, Jujuy, Salta, Santiago del Estero,[1] and Tucumán. The region presents the following biomes from west to east: