| The color change that English peppered moths underwent during the 1800s is a classic example of directional selection. Before the Industrial Revolution took place in England in the late 1700s, light-colored English peppered moths that blended with the lichen-covered bark of trees were far more prevalent than dark-colored English peppered moths. However, pollution from the Industrial Revolution killed the lichen on trees, leaving their dark bark exposed, and the contrasting light-colored moths became easy prey for birds. The dark English peppered moths, camouflaged on the dark bark, soon became far more common than the lighter varieties in polluted areas. |
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