[cat] The Pityusic Islands host an exceptional natural heritage and biodiversity. Knowledge of biodiversity is crucial in order to determine the management and protection needs and in this way guarantee its future conservation. The main objective of this study is the analysis of the evolution of natural protected areas of Eivissa and Formentera, as well as the analysis of land cover in the coastal strip of the first kilometer. Since biodiversity loss is one of the main global ecological problems, this knowledge is fundamental for future planning and management of the natural areas of the Pityusics. In 2013, the area included in the Natura 2000 Network (marine and terrestrial) was 32,137.77 ha, which increased notably in 2014 with the incorporation of the marine area of Formentera and South of Eivissa (47,026.14 ha), the marine area of West and North of Eivissa (47,162.02 ha) and the marine area of the East of Eivissa (19,158.84 ha). Nonetheless, despite the expansion of protected areas, management plans are essential for their correct conservation and this issue has been historically troublesome. Keywords: Protected Natural Areas, management plan, Pityusic islands, protection classes.