We have found a few spiders like this one around the back entrance to our house. I am wondering if this is a brown widow spider or a form of the black widow. This one built it's web on the stairs and was really quite active. I thought they didn't usually inhabit places that are busy with activity from humans? I am also curious as to the best method to get rid of them and how to make sure they do not get inside our house. I have a small baby that is on the floor playing often and I also have a small dog that loves to chase, torture and eat spiders. How dangerous is thier venom?