I think there are tarantulas that are Native to the US; AZ IIRC.
Best part of moving above 7K ASL in NM was not seeing the fuzzy nasties, and many fewer black widows.
Of course, I'm back in Texas, but I'm semi-urban, so I don't expect to see any. And if I do, I have #8 shot for the shotguns. If I remember to reload from the 00 buck shot.
/johnny