Get yourself a nice black rat snake. (Unironically, it drives me up a wall when I hear about people trying to exterminate snakes and spiders; the only reason those are around is because their food is.)

> the only reason those are around is because their food is

For some reason everybody in my city is proudly boasting bout the recent large capybara population... And again, for some reason those same people didn't react well when jaguars decided to show up in the urban area.

People are stupid.

We have all of the above and more. Alas, my wife is more afraid of our rat and pine snakes than she is of mice and rats.

Fortunately, the pine snakes only try to move into our house and sheds once or twice a year or so.

I have a black widow problem. Their food is flying insects.... Any tips?

I wouldn't worry about them. A few thousand people get bit by them every year but there hasn't been a fatality in decades. They're very unlikely to bite and very unlikely to cause any harm at all even if they do bite.

Maybe get some sticky fly paper though.

What eats them? (Really, from a distance they seem unbeatable.)

Daddy long-legs are known predators of Australian red-backs, while the American cellar spider supposedly hunts black widows.

Wasps

If you have mice you won't have rats. Mice can be a positive sign.

I have both. I've trapped both in the same trap on the same night.

Rats are brilliant animals, they’re just tiny dogs. If you treat your rats well, they would have no reason to attack mice and would co-exist (although your rats would probably get sick because of disease. Pet rats (fancy rats) are illness prone.)

Next step: get some turtles!