Pretty sure picture #1 is a copperhead, was seen swimming across river. Has very obvious hourglass type markings

Picture #2 a little less sure of, stripes more so than hourglass markings. This one was on our lawn at the beginning of our dock. Many have said they believe it to be a water snake, I'm hoping this is the case, venomous worries me in my back yard, I have a bulldog without much brains and wouldn't want her to come across this guy if posionous