As someone upstream pointed out, the analogy would be better served as mutation being the fuel of biological evolution while natural selection is the engine that turns it into motion and direction (towards greater reproductive fitness in a specific environment).
Any mutation on the wings of a species of butterfly will be conserved and spread if it results in the butterflies that have them reproducing more. A spot that might be an eye would make a slight difference, and a slight difference is enough over time. Any further mutations that make the spots look more eye-like would be conserved. Since the Owl Butterflies are large and only fly very short distances at a time, they're easy for predators to spot and track. They prefer to fly in dusk, when birds that might prey on them are less active, but owls are likely to be about. Other butterflies have 'eyespots' on their wings, but it's easy to see why this particular species would be under selection pressures that favored particularly large ones, with a yellow ring around the dark portion. Some number of predators will back off seeing those. It may have taken thousand of generations for this trait to develop in Owl Butterflies, if they have four generations per year like Monarchs; if it took 10,000 generations, that would be about 2,500 years.
Any mutation on the wings of a species of butterfly will be conserved and spread if it results in the butterflies that have them reproducing more. A spot that might be an eye would make a slight difference, and a slight difference is enough over time. Any further mutations that make the spots look more eye-like would be conserved. Since the Owl Butterflies are large and only fly very short distances at a time, they're easy for predators to spot and track. They prefer to fly in dusk, when birds that might prey on them are less active, but owls are likely to be about. Other butterflies have 'eyespots' on their wings, but it's easy to see why this particular species would be under selection pressures that favored particularly large ones, with a yellow ring around the dark portion. Some number of predators will back off seeing those. It may have taken thousand of generations for this trait to develop in Owl Butterflies, if they have four generations per year like Monarchs; if it took 10,000 generations, that would be about 2,500 years.
I'm not anti-Christian. I'm anti-stupid.