Fig. 6.

Traveling wave in fully limbed lizards induced by substrate weakening. Comparison of the body-wave dynamics of U. scoparia on sandpaper (A), on a loosely packed granular medium (B), and on an aerated granular medium (C). An almost perfect standing wave is observed for U. scoparia on sandpaper and on the loosely packed granular medium, while features of a traveling wave emerge for U. scoparia on the aerated granular medium. Resulting σ and λ are shown in Fig. 3B. The units of the colorbar are SVL⁻¹ for all panels.