The same linear relationship between time of peak firing rate and l/‖v‖ is found across locust species. A–C, Plot of the time of peak firing rate as a function of l/‖v‖ (mean ± SD) in three animals belonging to three different locust species (A, L. migratoria, α = 2.7 ± 0.5, δ = 8.7 ± 7.9 msec, same animal as in Fig. 1; B, S. americana, α = 3.5 ± 0.8, δ = 6.2 ± 13.1 msec; C, S. gregaria, α = 3.3 ± 0.9, δ = 9.3 ± 16.7 msec). D, Values of the mean angular threshold size and the mean delay between angular threshold and peak firing rate in 64 animals of the species S. americana, 5 animals of the speciesS. gregaria, and 11 animals of the species L. migratoria.