We have black widows and brown recluse spiders here that live in dark places.We have several different types of scorpions here. As I understand it the big ones are no more dangerous than a bee sting unless you’re allergic. However there are two small species that can and do kill people and they hang out in the walls of houses usually. A park ranger told me once that he never puts his hands anywhere he can’t see and he wears gloves always. I have heeded that advice!
Not putting you hands where you can't see them is the rule here too!