Fig. 5. Histograms of kinematic parameters within uniform (A) and textured (B) backgrounds. The distribution of angular velocity taken from inter-saccade flight segments is similar for flight within a textured or uniform background. The mean horizontal velocity is reduced during flight within a textured background, and the variance of vertical velocity is reduced. In addition, flies tend to fly at a lower altitude within a textured background. The uniform background data come from 58 trajectories totaling 916 s, the textured background data come from 36 trajectories totaling 1020 s.