HABITAT: Monarch caterpillars need milkweeds as host plants ... Caterpillars take 9 to 14 days to go through five instar stages before pupating. The first instar larva, just out of the egg, is solid ...
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Monarch caterpillar found to switch from avoiding milkweed-toxin-rich latex to eating it as they ageAnd that allowed the caterpillars to hold the toxins in their bodies, helping to fend off predators. More information: Anja Betz et al, Late-instar monarch caterpillars sabotage milkweed to ...
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