Changes

==Rectilinear crawling==

==Rectilinear crawling==

The edges of the scales act as anchor points and the muscles then pull the body up to that point. This is often used by large snakes.  The motion is similar to that of a caterpillar crawling involving waves of bilaterally symmetrical muscle contractions.

The edges of the scales act as anchor points and the muscles then pull the body up to that point. This is often used by large snakes.  The motion is similar to that of a caterpillar crawling and involves waves of bilaterally symmetrical muscle contractions.

* This type of locomotion is common in [[Boidae|boas]], [[Pythoninae|pythons]], and stocky [[Viperidae|vipers]].

* This type of locomotion is common in [[Boidae|boas]], [[Pythoninae|pythons]], and stocky [[Viperidae|vipers]].