In the Mountains of León, the systems have been maintained for centuries, contributing directly to food security and the livelihoods of local communities. Local animal varieties have been domesticated and developed over centuries to meet the environmental and social requirements of the territory that forms the Mountains of León system. The diversity of land uses with forests (including chestnut groves, beech forests, birches, junipers, oak groves), pastures and areas under cultivation generates a space for coexistence of agriculture, livestock, forestry, gathering, hunting and fishing, giving the area great agro- ecological value.