Fig. 7. Representative polar scatter plot of landing positions (owl Q). (A) The center of the plots corresponds to the target speaker position. The landing positions of trials with a correction turn (triangles) or without a correction turn (black dots) are plotted clockwise from 0 to 359 deg. in a circular diagram. The central gray circle indicates the `hit' area of a 20 cm radius around the centre of the target speaker. The maximum landing distance was 128 cm (see gray line and number). Gray and black dots outside the circle indicate the landings in a particular quadrant. (B-E) The landing positions of the three owls were analyzed for trials without (B,D) or with a correction turn (C,E) for the distribution of their angles [ (degrees); B,C] and distances [ (cm); D,E]. The positions were divided into bins of 30 deg. () or 10 cm () and plotted into histograms. In trials without correction turn the distribution of angles is double-peaked between 75 and 135 deg. and between 195 and 255 deg. (B). The distances exhibit one peak at distances between 35 and 115 cm (D). In trials with a correction turn, the distribution of angles is less bifurcated than in trials without a correction turn (C). Distances are distributed around values between 5 and 35 cm (E).