Rattlesnake arena So, here’s a quick demonstration on how snake-proof fencing works. It’s not rocket science, however, there are several things that MUST be done in order for it to be 100% effective. The prisoner in this video is a western pygmy rattlesnake- Sistrurus miliarius streckeri. These are the smallest venomous snakes in Texas and this particular snake is smaller than any newborn western diamondback or copperhead is. People often ask: 1) Is it guaranteed to keep rattlesnakes/copperheads