The Transitional or Pedemontane Forest originally grew in a discontinuous and irregular area along the foot and lower slopes of mountain ranges, covering about 750.000 hectares, providing a 25 % of the whole Cloud Forest in Argentinean territory. From 1850 this natural environment has given way to intensively farmed areas with sugar cane plantations. At present two thirds of that original Transitional Forest has disappeared due to human activity causing a greater degree of fragmentation. Only remnant patches of this special forest still survive, surrounded by cultivated fields, impoverished natural habitats, roads and urban areas. The habitat fragmentation is still going on at an alarming rate, with ever-increasing farming process, oil exploitation works, inadequate river management based on large damming projects and indiscriminate exploitation of wildlife.