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Somewhat camouflaged on a multi-colored granite rock is a painted lichen moth caterpillar. Keith Corliss / Forum Communications Co.

Flight Lines: Little discoveries on the North Dakota prairie

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"I doubt it."

That was my answer to the question, "Do you think these caterpillars are eating lichens?" Sure there were quite a few of them crawling on the large lichen-encrusted rocks on a beautiful piece of native prairie south of Woodworth last weekend, but the idea just didn't fit the paradigm I had of moth and butterfly caterpillars.

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