I know this would vary from locale to locale, but, presumably, there are some animals that do not require a permit to kill (mice in mouse traps, for example). How does this work? Is there a list of “always OK to kill” species?
Edit: Thank you everybody for the replies!
I’m in the US. I would look under local small game rules. You should be able to find a list or table of critters considered game, and maybe specific rules on “nuisances”. If it isn’t called out as needing anything special then you’re probably fine.