Paraguay is located at the confluence of a number of globally important ecoregions, namely the upper ParanÃ¡ Atlantic Forest, the Cerrado, the Argentine Mesopotamian Grasslands, the Chaco (Humid and Dry) and the Pantanal. The southward-flowing Paraguay River divides the country into two distinct regions: the relatively flat Chaco to the west of the river, and the more topographically diverse âOrienteâ to the east. (Portion of text from: Guyra Paraguay 2004, Annotated Checklist of the Birds of Paraguay, Paraguay.) This photo is of the Humid Chaco. Soy and rice cultivation (visible in lower left) is expanding in the region.