Serendipitous snake discovery, Hurricane (Harvey) aftermath video

I have been tracking some snakes in a ditch near my house and today confirmed the snake(s) as non-poisonous by viewing the split scales behind the vent of the snake.  I have been noticing round pupils (which indicate U.S.A. nonpoisonous) for a while.  Relatively sure that I am tracking Nerodia rhombifer, a diamondback watersnake…….

Post-Hurricane Harvey effects in North Mississippi, August 31, 2017 in the following snake video.

How to identify between poisonous and non-poisonous snakes

National Audubon Society Field Guide to Reptiles and Amphibians:  North America