Practice question

Successful Batesian mimicry usually requires the harmless mimic to remain less common than the harmful or unpalatable model. Predators learn the shared warning phenotype by sampling organisms and experiencing the model’s defense. If harmless mimics become too abundant, attacks on that phenotype are rewarded too often, avoidance weakens, and the protective value of resemblance declines through negative frequency-dependent selection. An educated predator is therefore important, because learned association links the model’s appearance with danger. The model normally needs to outnumber the mimic, and both must occur within the predator’s perceptual and foraging environment; strict overlap in food resources between model and mimic is unnecessary because the crucial overlap is with the same predators. Thus, “more mimics than models” reverses a central condition for stable Batesian protection. Exceptions may occur when predators have strong innate avoidance or the model is extremely dangerous, but the general prediction remains that increasing mimic frequency erodes signal reliability and raises attack rates on both mimic and model.