Since 1988 the archipelago has been declared a wildlife reserve. It is as an optimal place for the reproductive activities of certain sea birds. The local colony of Audouin's gulls (which is a species listed as Near Threatened globally) is one of the most important in the world and key to the species ongoing recovery in the Spanish Mediterranean. The islets are also home for one of the major stable populations of Eleanora's falcon in Spain. Besides, the islets are very important during spring and autumn bird migrations, since many different species who follow the Spanish Mediterranean coast in the course of their migration use them as a brief stop in order to rest.