What is the worst type of vermin where you live?

This question was inspired by @Adagio’s comment on the question about the smell coming from under the house and she mentioned a dead rat. I got to wondering if rats in New Zealand were anything like the rats in the midwestern US.

We have Jellies on here from around the world—what is the worst type of vermin where you live and what are they like? Are they despised or tolerated or exterminated or what?

While clearly vermin in many cases, I don’t mean political party representatives however tempting they may be to list.