First comprehensive overview of the numerous ecoregions of Argentina, with their ecological features and their main plant and animal components. Describes the main protected areas including all National Parks, as well as those firmly established or more promising natural reserves of the private and the provincial systems. These sites are presented as subtopics within the chapters dealing with the respective ecoregions, in order to combine a wider understanding of their ecology and their specific characteristics. Presents an overall view of the biological richness of the country.