Dwarf Reed Snakes Cartwheel to Escape Danger

In Southeast Asia, a tiny reptile known as the dwarf reed snake can roll along the ground like a wheel. The snake, which rarely exceeds 12 inches, curls into a C shape and lifts its head straight ahead before whipping its tail over and down past the head. This rolling motion keeps the head stable and pointed forward while the body rotates quickly. The result is a cartwheel that lets the snake escape danger faster than ordinary slithering.

Speed of the Cartwheel

When the snake rolls, it can reach speeds of about a foot per second—roughly four times faster than it moves when it slithers. In lab experiments, the same species were recorded tumbling at 1.7 to 3.7 meters per second, or between six and thirteen kilometers per hour. Those speeds show how the cartwheel can cover ground quickly in a very short space.

Scientists explain the motion as a series of ‘strokes’ that alternate the side of the body touching the ground. One side of the snake swings forward toward the floor while the other arches over the head. The snake then brings its tail down either to the left or right side of the head, allowing another roll to start. This coordinated pattern lets the animal maintain a stable head while the rest of its body spins.

To observe the behavior, researchers from Toho University set up a 2.2‑meter racetrack and placed individual snakes at one end. A gentle tap prompted the snake to begin rolling, and cameras recorded the motion from above and beside the track. The study collected 11 P. saravacense, one P. collaris, one P. longiceps and six Calamaria reed snakes for comparison. Only the Pseudorabdion species performed the cartwheel.