In order to ascertain the movements and activity of cattle grazing in the forest openings of Mt Kallidromo, two GPS collars were put on two cows to track their movements. This method is applied for the first time in Greece. This is a trial to test the functionality of the system and to gain experience for the stand-alone application next year. The animal movements are transmitted by SMS via mobile phone network to central receivers, outside the study area, in the Rangeland Ecology Laboratory of the School of Forestry & Natural Environment, Aristotle University, and the Institute of Mediterranean Forest Ecosystems.