SCI. Sites of Community Importance (SCI) are territorial areas containing habitats and species that are representative of the biogeographical region where they are included, and which must be protected, preserved, recuperated and restored. The habitats and species included in these SCIs appear within the Annexes of the "Habitats Directive"; the Member States propose the number and surface area of candidate areas, whose declaration is ultimately the decision of the European Commission.

The Balearic Islands are home to a total of 127 SCIs covering a total surface area of 201,883 ha; this figure does not include caves or wetlands.