The population of ferreret, Alytes muletensis, an endemic frog of Europe and restricted to the Serra de Tramuntana, is growing slowly although it continues to be listed as an endangered species in the first Spanish Red List of Endangered Species, which the International Union for Conservation of Nature presented this Friday within the framework of World Biodiversity Day. According to the list, consulted by Europa Press, the population is approximately 500 to 1,500 adult pairs, although it is growing slowly thanks to coordinated recovery efforts after a long period of decline and near extinction. The current increase, which probably began around the time the first reintroductions were made in 1989, has been maintained even during years of drought, notably in 1999-2000.