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Scouts are a special case in Civilization IV: Colonization. They are made whenever you move a colonist out of the colony and choose the option to make a Scout. It requires 50 horses to do this. The Scout has no Civilopedia entry in the game aside from the Seasoned Scout entry.

Any colonist can be made into a Scout, and he retains any specialization he had, such as Master Distiller, for example.