Some species evolve to resemble another species so as to protect themselves from predation, but this mimicry is often imprecise. An analysis of hoverflies suggests why imperfect imitation persists in the face of natural selection. See Letter p.461
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Pfennig, D., Kikuchi, D. Life imperfectly imitates life. Nature 483, 410–411 (2012). https://doi.org/10.1038/483410a
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DOI: https://doi.org/10.1038/483410a
