What critters live at my house? Under the house for sure are possum(s), mice and (so I've been told) snakes. I've actually never seen the snakes, but those who have tell me it is just a black one. The possums became apparent last week. Actually, I've been smelling a strange odor, which I now think must be those critters. I saw digging around the periphery, plugged the hole and while sitting at the window the other day, saw one meander over and into a new hole. I looked them up on the net and while I can't say I'd walk across the street to get one, they don't seem to be particularly dangerous or overly bothersome, other than what I suppose is the odor.