Fig. 5. Angular velocity of the visual panorama while the animal tried to keep the black stripe in the frontal position of the compound eyes. Data correspond to the time traces shown in Fig. 4. (A–F) Flight at the damping coefficients 52, 156, 260, 520, 1040 and 5200 pNm s, respectively. Solid black lines indicate the threshold (±390 deg. s^–1) for visual motion detection (50% response, Fig. 1E). See Fig. 4 for more details. Positive (negative) velocities indicate clockwise (counter clockwise) rotation.