How Do Snakes Move?

Snake

Despite the fact that they have no legs, snakes are able to move and get along very well indeed.  Most snakes slither along in a serpentine motion—pushing against the ground and weaving forward in  a series of graceful, S-shaped curves.  

Many large, heavy snakes crawl straight ahead like a caterpillar, pushing with their belly scales and humping along.  Snakes called “sidewinders” live in the desert where the sand is too loose to push against.  

This kind of snake moves in a series of sideways loops.  Snakes climb well, too.  And, oddly enough, they all can swim. – Dick Rogers