But the bird-dropping moth is very different because it can easily be seen. Many people argue that precise adaptations shown by organisms are the best evidence of intelligent design, the hallmark of a creator. Note that both hypotheses account for the observations, and that neither can be proved true. The issue cannot be decided on this basis alone, because science is not a belief, it is a process for learning about the natural world. Examine what happens when a science student attempts to use both hypotheses to learn about the natural world.
Several predictions come to mind.
The nearest relatives of the bird-dropping moths should be light in color, probably with some black flecking or spots, and may have the ability to wrap their wings around their bodies. They probably are cryptically colored, hiding by blending with their backgrounds. Perhaps this moth just tastes bad, and birds have learned to avoid eating such conspicuous moths like they have learned to avoid monarch butterflies. If palatable, then if birds could perceive the moth they would eat it, so any variants that look less like bird-droppings should be eaten more frequently than better mimics. These predictions can be tested by manipulation experiments and observations, which will either confirm or falsify them.