Mimicry

Lore & Background

Aristotle wrote in his History of Animals about partridges using deceptive distraction displays to lure predators away from their young, a behavior recognized as a form of mimicry. Fritz Müller described a situation where different unpalatable species share similar warning signals, now called Müllerian mimicry, and put forward the first mathematical model of mimicry.

Reader's Guide

Mimicry is a central concept in evolutionary biology, illustrating how natural selection shapes resemblance between species. Batesian mimicry demonstrates parasitic deception, where a harmless mimic gains protection by resembling a harmful model. Müllerian mimicry shows mutualistic convergence among defended species. The phenomenon spans sensory modalities—visual, acoustic, chemical, tactile, or electric—and occurs across animals, plants, and fungi. Mimicry can lead to evolutionary arms races if it negatively affects the model. It is widely accepted as a positive adaptation, though Vladimir Nabokov argued natural selection might stabilize but not create mimic forms. The two-step hypothesis explains its evolution: first, mutation in modifier genes causes large morphological changes; second, selection on smaller-effect genes refines resemblance. Mimicry remains a key example of coevolution and adaptive deception.

Did You Know?

• Aristotle described partridges using deceptive distraction displays, recognized as a form of mimicry.
• Batesian mimicry involves a harmless mimic resembling a harmful model to deceive a dupe.
• Müllerian mimicry is honest, where different harmful species resemble each other with aposematic warning coloration.