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Fig. 6. Dual-choice experiment on D. elpenor (experiment 3). (A) Turquoise used as rewarded colour patch (surrounded by a white circle). Choices made by 10 D. elpenor for the different colour patches under white (N=376) and yellow (N=173) illumination. (B) Green used as rewarded colour (surrounded by a white circle). Choices made by 10 D. elpenor, under white (N=137) and yellow (N=55) illumination.