Movie 6

Light avoidance of groups of stage 1 and stage 3 larvae
(A) Showing stage 1 larvae moving in a central dark area surrounded by a light annulus of the indicated width (w) for 7 min (5 fold time-lapse). From 26 s onwards, r_in and r_out and larval trajectories are blended in (Fig. S5A). The flags are set to define r_in and r_out. Trajectories are boldened after 73 s. Light avoidance is measured in the dark-light border zone (r_out - r_in).
(B) Likewise showing stage 3 larvae moving in a central dark area surrounded by a light annulus of the indicated width (w) for 7 min (5 fold time-lapse). From 26 s onwards, r_in and r_out and larval trajectories are blended in (Fig. S5A). The flags are set to define r_in and r_out. Trajectories are boldened after 73 s. Light avoidance is measured in the dark-light border zone (r_out - r_in).