If you thought you were safe indoors from what lives outside, think again. A house in need of repairs looks no different to a critter than a campsite in the woods. Fortunately, with careful inspection and a little bit of effort, you can turn your pad into an impenetrable fortress against aggressors of all sizes. Click through to see the nine worst killers that can get you where you live—along with how to keep them at bay. We've got tips for keeping alligators off your property, scorpions out of your shoes, and bears from turning your garbage into a free buffet—all with the hope of preventing potentially fatal bites, stings, and sharp claws from striking you dead in the place you call home.