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peppered moth

a European geometrid moth, Biston betularia, occurring in a pale grey speckled form in rural areas and a black form in industrial regions See also melanism (sense 1)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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  • This case of the peppered moth shews how swiftly a change may come over a species.

    Mimicry in Butterflies Reginald Crundall Punnett

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