‎‎

By the late 19th century the population expansion and the advancement of agricultural and livestock frontiers initiated a marked contraction of the area occupied by the puma, especially in the Pampas grasslands, one of the most threatened ecoregions on the planet. The extirpation process was so significant in the Argentine Pampas that the puma became extinct in the province of Entre Ríos, southern Santa Fe, southeastern Córdoba, and northern and central Buenos Aires provinces.

Until just over a decade ago, knowledge about the puma (Puma concolor) in the Pampas ecoregion was so scarce that some distribution maps did not include the feline in this extensive area, considering it extinct. Only from 2010 onwards did the state of ignorance about the puma in this ecoregion begin to reverse with the contributions made by the "Pampas Puma Project." The research conducted by the project revealed reproductive populations and the existence of a amazing recolonization process that now encompasses practically the entire ecoregion.

‎‎