Batesian mimicry is a form of camouflage where a harmless species evolves to resemble a harmful or unpalatable one. This mimicry helps the harmless species avoid predation, as predators learn to associate the appearance of the harmful species with a negative experience, such as a bad taste or a painful sting. An example of Batesian mimicry is the viceroy butterfly, which looks similar to the monarch butterfly. While the monarch is toxic to predators, the viceroy is not. By mimicking the appearance of the toxic monarch, the viceroy gains protection from predators that have learned to avoid the harmful species.