Neandertals made tools from stone that almost always came from the immediate vicinity of their campsites. Archaeologist Jean-Michel Geneste has shown that for SW France less than 10% of the flint for tools came from more than 10 km away, and less than 1% of it came from more than 100 km distant. This pattern implies that tool manufacture and use were expedient; that is, Neandertals did not make long-term plans but made tools as needed and discarded them immediately after use. This idea of limited planning is perhaps supported by the Neandertals' apparent failure to profit by cyclical patterning in the environment. Migratory fish, which provide a rich resource at the same time each year, were seldom exploited, for example. Nor do Neandertals seem to have taken advantage of the highly predictable migrations of reindeer, which became very important for modern humans.