I lived for years with Brown Recluse spiders in my house in Missouri without knowing what they were when I saw them. They typically like dark, undisturbed places like behind picture frames and are actually quite common where I was. It's surprising more people don't get bitten. Mine was in the sleeve of a bathrobe I had hanging next to a dark, undisturbed place. You don't feel the bite but you feel nauseous briefly afterword. I remember thinking why on earth do I feel nauseous? How odd!