Fluttering through Twitter. Some info:
If they’re looking for mates, they’ll flash their colors, but if they want to hide from predators, they simply close their wings.
Bryan Nelson, “11 amazing examples of insect camouflage” at MNN.com
Given a time period for the emergence of butterflies, what is the probability of this camouflage occurring by purely Darwinian means? If calculation replaced assertion, we’d likely be looking for other mechanisms than natural selection acting on random mutations.