Wave-like shape of a snake under parallel lateral constraints on a horizontal plane

Wave-like shape of a snake under parallel lateral constraints on a horizontal plane. The length of the snakes is 61+4 cm; the radius of the snake is 1 cm; the width between constraints is respectively 2, 3, 4, 5, 6 cm from (a–e).

http://rsif.royalsocietypublishing.org/content/10/85/20130399.short