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Thus, these caterpillars also engage in behavioral crypsis. When disturbed, the caterpillar sways slowly from side to side on two prominent prolegs, mimicking a leaf wavering in the breeze. If predation shaped the natural selection of this behavioral adaptation, would there be variation in the dancing trait in different environments? Beyond predation or attack by visually oriented parasites, what other selective forces could add to these cryptic morphologies and behaviors? What is the role of genetic drift or random chance in the evolution of traits that contribute to these putative adaptations?