The Queen is one of many insects that derives chemical defenses against its predators from its food plant. Most of the toxic cardenolides that make queens so unpalatable to its predators are sequestered from larval host plants. Basically, the Queen shares a Müllerian mimicry with the Monarch. However, the extent of its toxicity varies a great deal in different parts of its range. Micro-geographic differences in the environment lead to variation in the dynamics of mimetic relationships even at a local level.
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