One San Antonio resident got more than he bargained for as he discovered four diamondback snakes at the River Walk. Thomas Sinard, a recent transplant from Ohio, reported he encountered the snakes in a diverting stream not far from the Museum Reach area of the River Walk. An avid hiker, Sinard has seen reptiles many times, but he admitted the snakes surprised him.
Also known as the diamondback water snake (Nerodia rhombifer), these are not to be confused with the legendary diamondback rattlesnake that strikes fear into the hearts of many Texans. Although the sight of them may cause a casual hiker to pause, this water snake is non-venomous and non-aggressive. The western diamondback rattlesnake or Texas diamondback rattlesnake (Crotalus atrox), is venomous and usually found in climates that are more arid and dry.