Both areas are used by traditional nomadic/transhumance herders to practice their ancient lifestyle and culture. Fulani herdsmen engage in both random and planned transhumance movements. Often traditional nomadic groups settle into a regular seasonal pattern of transhumance. However, the Tuareg and Zenaga of the southern Sahara practice nomadic transhumance. They are a pastoral semi-nomadic community, practising transhumance. "Mesta" flocks followed a seasonal pattern of transhumance across Spain. It is characterized by the traditional herding economy (transhumance). Near mountains, herds are led uphill in summer and downhill in winter (transhumance). The High Alps are those parts of the Alps unsuitable for habitation or seasonal transhumance. Giraldus Cambrensis portrayed a Gaelic society in which cattle farming and transhumance was the norm. At the same time, migrations, trade and transhumance took it deep into the Sahara. Traces of transhumance appear in the neolithic. Instead open land was used for feeding, and seasonal transhumance was practiced. The higher regions not suitable for transhumance are known as the High Alps. Other groups, such as the Chaouis, practised fixed transhumance.