The public forest of Eygues stretches on a zone of about 20,95 km² and the major part of it’s territory is in Le Rosanais. At the south of this forest, there is a protected area (ZNIEFF zone – Zone of Interest for Ecology, Flora and Fauna –). Thorny trees are a specific feature of this natural habitat. Black grouses, Le Sélin à feuilles de silaus – a particular type of flower you can only see in the Alps – and Irish fleabane, are determining species protected at a national level.