Signal design and courtship presentation coincide for highly biased delivery of an iridescent butterfly mating signal.

Given our primary interest in average male performance across models of signal conspicuousness, we focus hereafter on the main effect of “signal model.” Post-hoc multiple comparisons revealed highly significant differences in mean signal intensity scores across all models except for the contrast of “brightness and area” against “brightness and flash-effect” (Fig. 4 ).

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