<p dir="ltr">This contains a video supplement for Rubin et al. (2025) "Networks of sexually dimorphic neurons that regulate social behaviors in<i> </i><i>Drosophila"</i></p><p dir="ltr"><b>Video S2. Male-male behavior of upon activation of selected P1/pC1x cell types.</b> The expression pattern for each P1/pC1x split-GAL4 driver line is shown prior to the behavioral video for each line. Each video is displayed at 2x speed (120 FPS) and contains both a bird’s eye view of all nine arenas (Left) and a zoom into one arena from the same experiment (Right). The photoactivation (at 2.9 or 3.5 mW/cm<sup>2</sup>) period is indicated with a red dotted outline.</p>