Movie 2

Part 1. Intact and haltereless flies show a robust gaze stabilization response when stimulated with wide-field motion at 30° sec^-1. Left: intact fly; right: haltereless fly.
Part 2. Left: intact flies show a strong gaze stabilization response when stimulated with wide-field motion at 90° sec^-1. Note that the amplitude of head movement is maximal, with the head rotating until it touches the edge of the thorax. Right: haltereless flies show an obvious, but smaller, gaze stabilization response when stimulated with wide-field motion at 90° sec^-1.