Fig. 3. A jump by a nymph from a horizontal stance. (A) Selected images from a jump captured at 250 Hz. The timing of the images refers to the graphs in B and the outlines in C. Take-off occurred at 0 ms. (B) Graph of the changes in angle of the joints between the meso- and metathorax (m/m in the inset diagram of the insect), between the metathorax and abdomen (m/a) and between the femur and tibia (f/t) of a hind leg. The change in height of the mesothoracic coxa above the ground is also plotted (Body height). Each point is measured from contiguous images separated in time by 4 ms. The vertical yellow bars indicate when the legs lost contact with the ground and when take-off occurred at 0 ms. The same colour coding is used in subsequent figures. (C) Tracings of the movements of the head, thorax and abdomen during the jump. The jump trajectory was forwards and downwards with a take-off velocity of 0.8 m s^-1.