Industrial melanism is an adaptation where the moths living in the industrial areas developed melanin pigments to match their body to the black soot (smoke) covered surroundings. The peppered moths exist into two strains- light (white) coloured and melanic(black). Before industrialisation, all moths were white and were unnoticed from predatory birds due to whitish lichens on the bark of trees. After industrialisation, the barks get covered by smoke so the white moths were more evidently visible and thus, picked up by birds. But black moths escaped unnoticed so they managed to survive resulting in more population of black moths and less population of white moths.