Photo: Melissa Hutchison Our Critter of the Week is the forest ringletbutterfly.
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The ringletbutterfly, for example, suffers badly in drought years.
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Our Critter of the Week is the forest ringletbutterfly Read more Audio 1:32 PM.
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Meanwhile, the peacock, comma, speckled wood and ringletbutterflies have continued to spread north rapidly in response to climate change, Butterfly Conservation said.
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The RingletButterfly also has whitish caterpillars, and this may at first sight appear to contradict the rule, since it feeds on grass.