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.
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)
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.
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.