<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 S3.</b> <b>Male group behavior upon activation of selected aIPg cell types.</b><b> </b>The expression pattern for the aIPg split-GAL4 driver line is shown prior to the video. The same video (recorded at 120 FPS) is shown twice: first at 120 FPS and then slowed down at 35 FPS. The photoactivation (2.7 mW/cm<sup>2</sup> at 660 nm) period is indicated with a red dotted outline.</p>