Both camouflage and mimicry work best when a predator is searching from a distance. When the predator gets close to the prey, and they are sure to be found, some prey switch methods, and flee (run away) or fight back. This behaviour is almost always instinctive. In any event, whether cryptic (hidden) or not, the prey's behaviour must match its mimicry. If it looks like a leaf twisting in the wind, then it has to twist in the wind. Almost all forms of mimicry involve appropriate behaviour to reinforce the visual impression.