We have had several friendly snake visitors to our house the past few months. While I often dismiss them as harmless, my wife is always concerned that we have poisonous rattlers roaming the yard. I usually try to get a picture of each one so that I can try and make a positive identification. Here are two of the most recent vipers.
This little guy appears to be a Eastern Ribbon Snake, Thamnophis sauritus.
I believe that this is a Black Rat Snake (Elaphe obsoleta), although my wife is convinced that it is a Timber Rattlesnake (Crotalus horridus). What do you think?

