Fig. 4. Homing paths of one subject in the four classes of experimental trials of experiment I. The large circles represent the experimental arena with the nest box in its standard 0° position (dashed rectangle) and in its rotated position (continuous rectangle) during the experimental trials. The 15 cm-wide peripheral zone is shown by a dotted circle. The dashed lines (and circles) represent the outward journey to points P1 and P2. The return journeys from the feeding place at the end of the outward journey to the peripheral annular zone of the arena are drawn for the four different (clockwise and counterclockwise) experimental trials.