Monarch Butterfly Caterpillars Go from Peaceful Feeders to Aggressive Fighters in Their Quest for Milkweed (VIDEO)

Florida Atlantic University

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The less food, the more likely caterpillars were to try to head-butt each other out of the way to get their fill, lunging and knocking aside other caterpillars to ensure their own survival. And, they are most aggressive right before the final stages of their metamorphosis.

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Florida Atlantic University

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