Viscacha
Plains viscacha (Lagostomus maximus): Lives in the Pampas of Argentina and Chile . It can be easily differentiated from other viscachas because it has black and gray moustache-like facial markings. This species makes colonies. It lives in warrens of ten to over one hundred. It is very vocal and emits alarm calls. The plains viscacha can strip grassland used to graze livestock; this caused ranchers to consider the rodent a pest species.