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  1. Mark Lew1s

    Great Tit's mimicry of Blue Tit

    I think that I’d just accept a certain (very small) amount of error. The things you hear making blue tit noises are still going to be blue tits the vast majority of the time.
  2. Mark Lew1s

    Great Tit's mimicry of Blue Tit

    It's a known thing - e.g. see https://www.sciencedirect.com/science/article/pii/S096098221001451X. Doesn't make it any easier in the field though...
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