I guess they're not shadows. They're the tips of the helicopter's legs Edit: in case it isn't clear, this a photo of the helicopter's shadow on the surface, ta

I guess they're not shadows. They're the tips of the helicopter's legs Edit: in case it isn't clear, this a photo of the helicopter's shadow on the surface, taken by a down-facing camera in the underside of the helicopter. It has a sort of fisheye lens, so there's some distortion at edges