Ah, fair enough. To be fair a good couple of spider species were able to cross continents via ballooning, so now that I think about it, mosquitoes doing just as well isn’t too far fetched.

Yeah, probably this. And the increase in temperature simply made the conditions bearable when they got outside.

Could they have also maybe just… flown over there? Insect migrations like this can happen, but I don’t think it’s possible on such a scale, even for mosquitoes.