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All M. structor's aren't clones, only in that colony.

They are out their in the wild reproducing with other M. structors sexually.

I thought one of the big points was there's no M. structor females on the islands.

They've extended their range, so there's lots of cases where they don't have wild ones around, but there's still overlap, at least according to the article I read.

noselasd 2 days ago [ - ]

Yes, in some areas - but not e.g. on Sicily. https://www.youtube.com/watch?v=Z-O4_AwWpfI gives perhaps a better overview

M. Ibericus produces 4 kinds of offsprings.

    1. M. Ibericus queen + no male (unfertilized egg) -> M. Ibericus male.
    2. M. Ibericus queen + M. Ibericus male -> M. Ibericus queen
    3. M. Ibericus queen + M. Structor male -> M. Structor male, no genes from the mother
    4. M. Ibericus queen + M. Structor male -> M. Structor/Ibericus hybrid female, (worker ant, infertile)