A case study to show an environmental change, can lead to a change in species, is the peppered moth. The peppered moth was originated in a population composed of lighter coloured moths that camouflaged themselves on lichen covered trees to hide from their main predator: birds. However, during the industrial revolution, the trees that were once covered in lichen and soot eventually died off. This was a disadvantage for the lighter coloured moths as they became easier for the birds to find their prey as the moths can longer camouflage themselves from this predator. The darker moth population can camouflage and hide better than the lighter moths which allows their predators to not find them as easy. This shows that their population shifts from
