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From Hunter Livestock Ireland — Facts about Extensive Livestock System by Hunter International Livestock
Nomadic/Pastoralist Systems: — These systems mainly include animals, sheep, goats and camels because others are not susceptible to the herd in general, and therefore, to roam with their owners. The movement of the herd is different from the seasonal movement to take advantage of grazing at a relatively short distance, which is available only for long distance activities in other areas which can cross the boundaries of one or more countries.