Transhumance is a type of pastoralism or nomadism, a seasonal movement of livestock between fixed summer and winter pastures. In montane regions, it implies movement between higher pastures in summer and lower valleys in winter. Herders have a permanent home, typically in valleys. Transhumance, called booleying in Ireland, is a practice found in many parts of Europe that involves the movement of livestock and their keepers from lowland, permanent settlements to summer pasture, usually in the uplands, where they remain generally from May to October.