My son had two snakes -in his house- last week. Yes, I said TWO!
They were getting showers before bed when the oldest grandchild hollered. My son caught the biggest one, but another one, slightly smaller went behind the sofa and then disappeared while he was getting rid of the other one. Can you imagine the horror of one freaked out mother howling and screaming inside a mobile home?
They spent that night at my house, then son went back the next day and found the other one. It had gotten up inside the sofa. We think the kids must have carried them in on their dump trucks. Now, that's scary!
We still aren't sure what they were, but apparently not venomous. One was about 3 ft long and very skinny. The second one was a few inches shorter. Probably rat snakes.
I begged them not to move out there... riverfront, and a canal along the side. We lived out there when my kids were younger so I knew about the snakiness.