Tethered males were divided in two groups: (i) sham control, with wing colouration manipulated by painting the tips (∼10% of wing area) of the wings on the dorsal surface with a black marker (Faber-Castell) that did not reflect UV light; (ii) treatment, the wings were painted from the tip to the nodus (∼55% of wing area), leaving the basal part of the wings with the original blue colouration. Three males were used in each category, presenting each male to five unique intact territorial males at a distance of 20 cm.