Of course these robo-snakes don't have to be an exact copy of a real snake.
https://www.hindawi.com/journals/jr/2019/1523493
https://meeng.technion.ac.il/snake-robots
https://www.bbc.com/news/science-environment-29523851
https://www.pnas.org/content/112/19/5870
It will still be a while until life like robotic creatures can be achieved.
https://bladerunner.fandom.com/wiki/Abdul_Ben_Hassan
https://moviepaws.com/2017/10/22/owls-snakes-and-unicorns-the-animals-of-blade-runner