A Peppered Moth is normally grey with black speckles across the wings, giving it its name. This patterning makes it well camouflaged against lichen-covered tree trunks when it rests on them during the day. There is also a naturally occurring genetic mutation which causes some moths to have almost black wings. These black forms (called 'melanic') are not as well camouflaged on the lichen as normal 'peppered' forms so they are more likely to be eaten by birds and other predators. This means that fewer melanic forms survive to breed and so they are less common in the population than the paler peppered forms. This is the normal situation observed in the countryside of Britain and Ireland.
What variation of the peppered moth is favored in the above conditions? Why?
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