Fig. 5. The mean cross correlation coefficient, r_m, for all treatments. Frequency is on the x axis, and the lines for different direction treatments are labeled (H, V, L). Mean r_m values for tracking ability start to fall off at 2 Hz for moths feeding from flowers moving in the L axis. Moths were unable to track 3 Hz L axis flowers. Both H and V axes flowers have high correlation coefficients for 1 and 2 Hz.