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Bedouin refers to people who make their living by means of stock raising, specifically on the marginal steppe lands not suited to sedentary agriculture. Their characteristic behavior is to take their family and belongings with them whenever they need to move their flocks to different pasture.
This change of pasture is seasonal, and follows a pattern which leads the bedouin to an annual migration between a series of locations where the family groups can congregate; there is usually one site and time each year where the water and pasture can support a larger gathering, where a greater portion of the tribe can get together. This is often the time for celebrations and marriages.
The point is that the nomadic life-style is marked by regular, seasonal movements - it does not include aimless wandering.