(Photo courtesy IDAHO DEPARTMENT OF FISH AND GAME)Monarch caterpillars feed exclusively on milkweed. They sequester chemicals, known as cardenolides, from milkweed, making them toxic to predators as both caterpillars and adults.
July 16, 2017
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July 16, 2017 1 a.m.
Idaho's Monarch connection
By BETH WATERBURY