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Extinction is observed in both operantly conditioned and classically conditioned behavior. When operant behavior that has been previously reinforced no longer produces reinforcing consequences the behavior gradually stops occurring.
Local extinction or extirpation is the condition of a species that ceases to exist in the chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinctions. Local extinctions may be followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this.