Fig. 8. Variations on backward movements by nymphs. (A) The insect stands erect and then moves rapidly backwards without lowering its body height so that it launches into a backward and downward jump from the platform. The position of the head in each frame from this 80 ms sequence is plotted in frame 0 ms. (B) The initial posture (0 ms) is a mimic of a twig in which all the legs are held parallel to the long axis of the prostrate body. The body is then pulled backwards away from a tactile stimulus to the head. The circles in the first frame (0 ms) measured from each frame in the 120 ms sequence show the backward movement of the head.