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Fig. 5. The mean cross correlation coefficient, rm, for all
treatments. Frequency is on the x axis, and the lines for different
direction treatments are labeled (H, V, L). Mean
rm 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.