Fig. 3. The contribution of the lateral and ventral visual fields to odometry. Variation in mean waggle duration (black bars) and the mean pure waggle duration (white bars) of bees after flying in a tunnel with different surfaces providing optic flow (random Julesz pattern) or no optic flow (axial stripes) (indicated below). Controls, behaviour after outdoor flight to the tunnel entrance; see text for details. Other details as in Fig. 1.