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Fig. 3. Cercal canopy response as a function of signal frequency for the five cricket populations. (A) Total response, (B) proportion (%) of variation from a mean cercal canopy response. Legends of populations are given in (B). Peak air velocity is 0.3 mm s-1. Arrows in (A) indicate signal frequencies emitted by running (30 Hz) and flying (170 Hz) natural predators of crickets.