CADI-MOIXERÓ NATURE Pyrenees bird's eye view. BY: Sergi REBOREDO. The Moixeró Natural Park, declared a Special Protection Area for birds by the European Union, is the largest in Catalonia. It has an area of 41,342 hectares that make up the territory of three regions: the Cerdanya, Alt Urgell Berguedà and located in Girona, Barcelona and Lleida respectively.