Figure 3. Ethogram of the male courtship between sexually mature virgin Drosophila bifurca. The letters indicate the five behaviors observed, and the numbers below each letter correspond to the relative percentages of the behaviors observed during the courtship. The size of the circles is proportionate to the value of the percentages. The arrows indicate the transition between the different behaviors, and their respective widths are proportionate. The numbers along the arrows indicate the relative percentages of the transitions between the different behaviors. Cl = Cleaning; O = orientation; C = circling; E = wing extension; Co = copulation.