 The name 'La Carballeda' originated in the great number of "Quercus robur" oaks, locally known as "carballos", in the comarca.The Sierra de la Culebra mountain range, one of the few areas in Western Europe having a sizeable population of wild wolves, is located in the southwest of the comarca.Some of the villages included in the historical comarca are part of municipalities which are now included the Sanabria comarca.