
Monarch Caterpillars
Two Monarch caterpillars make short work of a milkweed leaf. This will be their only food as the progress through five larval stages (instars). They accumulate toxins (Cardenolides) from their food that deter most predators. These toxins remain in their bodies into adulthood.

The monarch butterfly or simply monarch is a milkweed butterfly in the family Nymphalidae. Other common names depending on region include milkweed, common tiger, wanderer, and black veined brown. It may be the most familiar North American butterfly, and is considered an iconic pollinator species.
Similar species: Moths And Butterflies
By Thom_Morris
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Uploaded Jul 29, 2015. Captured Jul 27, 2015 10:16.