The ´Observatorio de Cambio Global de Sierra Nevada‘ is a proyect that was initiated a couple of years ago and which basic objectives are to define, quantify and characterise natural processes and resources for identifying and differentiating between natural situations and other situations resulting from global change in any of its multiple factors. About eighty people are involved in this ambitious proyect. While searching information on the internet on the Plebejus idas nevadensis we saw that this butterfly is one of the thirteen species that is being monitored by this ´Sierra Nevada Global Change Observatory´. Right underneath the photograph of this butterfly, we saw a photo of a cricket that we had seen on the same ´Chullo walk´. This interesting insect that we photographed at 2,200 metres is apparently a Pycnogaster inermis. This ´grillo de matorral´ or ´unarmed bush-cricket´ is endemic to the Sierra de los Filabres, Baza and Sierra Nevada. On this same website we can see that the Loma del Chullo and the Lagunilla Seca are on the list of areas in which the different species are being monitored.