How many spiders are in your home? (Part I)

Have you ever wondered how many spiders are in your home? Me too. Ever since moving into my unit I have discovered there are quite a lot of spiders crawling around (or floating as they do on their webs). The one in my shower is a female Black House Spider Badumna insignis . I call her Susan or Suz the shower spider. I was wondering about it all and thinking about what variables/factors would…