Video 11

Movie S11. Bat flying upwind to investigate leeward areas of a wind turbine with blades rotating at full speed at ∼0350 hours on July 31, 2012. Bat makes several upwind passes through the moving blades of the turbine without clear indication that it perceives and avoids the fast-moving blades before moving through their plane of motion. Blade rotation speed 14 rpm, wind out of the southwest (228°) at 7.2 m/s, and 95% moon illumination.