Fig. 7. The kinematics of a snake using the crawling behavior to cross a gap. (A) Forward (B) vertical and (C) lateral displacement of the snout of the snake versus time. The time intervals between successive points are all 100 ms. The snake touched the perch on the far side of the gap at 0 s. After moving forward with a nearly constant speed (–4.5 to –2.5 s), the snake gradually slowed before reaching the destination perch. Gap distance, 38 cm; snake SVL, 65 cm.