The Peppered Moth is argued to bring an illustration to evolutionary biology. I suppose. But, I personally don't feel there is that much evolution in this so much as frank and sustainable biology. Very simply put, The Peppered Moth had what it takes to survive. To understand the entire reality of this moth, Wikipedia has an interesting entry including the bird that sought as satiation in appetite the demise of the moth.
In it's genetic variability, The Peppered Moth survived the human created stress of pollution on tree trunks that would have destroyed them. Interesting to realize a moth could actually be so agile in it's genetic imprint to survive a manmade hurdle of their survival.
