Just saw a post on the popular page, “Snake moving in a straight line freak me out’. It made me realize that I have no idea how snakes move. How do snakes move when they don’t have any legs or other limbs?
In: Biology
The straight movement is all belly scales (like mlucaswalker said). On different surfaces they also add techniques. They take advantage of little bumps in the uneven ground to push off — this is where the common serpentine moves comes from. There also snakes that do a sidewinder move to cross slippery sand — kind of speedy throw your head out and snap your body along sideways.
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