I don't know much about snakes other than STAY AWAY, but I think this is definitely a Cottonmouth. If anyone thinks differently let me know and I'll change the title. This snake is indeed poisonous. I captured these photos during a walk along Back Bay in Virginia Beach. I was on a wooden walkway build just above the marsh below. He seemed rather content to stay put and have his picture taken. I didn't turn my back to him until there was ample distance between us.
May 23, 2017