The peppered moth Biston betularia is a species of night-flying moth.It is mostly found in the northern hemisphere in places like Asia, Europe and North America. The peppered moth is normally light-coloured. This allows it to be camouflaged on lichen-covered trees.During the Industrial revolution around 1848, trees in Manchester became blackened by soot from factories.At around that time a black, melanic form of the peppered moth appeared.By 1895, 98% of the peppered moths in Manchester were of the black type.This is an example of natural selection.