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||The site is characterised by landscape diversity, high biodiversity, the presence of many Cretan and Greek endemic species of flora and fauna, rare plant associations, rare species, threatened species and species in danger of extinction. More than 100 plant species of the site are endemic to the Cretan area. Some of them are extremely rare (species included in section 3.3. with motivation D). Horstrissea dolinicola is endemic to the site (a population of few individuals in Petradolakia). Many species of land snails are endemic (some of which are Cretan endemics). Deroceras minoicum is known only from a spring in Nida plateau. There is a rich endemic cave fauna with species restricted in one (or few) caves (e.g. Duvalius mixanigi, Serradium sbordoni). Also, Rhinolophus ferrum-equinum ssp. creticum, included in section 3.2.c. as Rhinolophus ferrum-equinum, is a subspecies endemic to Crete.Idi mountain is one of the EU's Important Bird Areas. Rouvas forest and Zaros canyon have been proposed for designation as biogenetic reserve. OTHER IMPORTANT SPECIES WITH MOTIVATION DThe following species are protected by the Greek Law (Presidential Decree 67/81) and are included in the IUCN Red Data List (1993) in the category of threatened plants: Cotoneaster nummularia (vulnerable), Convolvulus libanoticus (rare), Anthemis abrotanifolia (rare), Campanula jacquinii (rare), Cirsium morinifolium (rare), Corydalis rutifolia ssp. uniflora (rare).Asperula idaea, Ohrys basilissa and Phagnalon pygmaeum are protected by the Greek Law (Presidential Decree 67/81).Valantia aprica is a balkan endemic (Greece, Albania).Arum creticum is a species with distribution in Crete and the East Aegean found only in SW. Turkey out of Greece. Amelanchier ovalis ssp. cretica is a subspecies with distribution in Sicily and Greece. Viola rauliniana is a species with distribution in W. & C. Crete and Cyprus. Satureja spinosa is a species of Crete and East Aegan occcuring only in SW. Anatolia out of Greece.Allancastria cerysii is protected by the Presidential Decree 67/81.