Fig. 6. Trajectories of zero-vector ants (N=15) displaced 10 m west of the nest–feeder line. Cylinders in the route-mark corridor are shown as black circles along with the nest N, feeder F and release position R. (A) All trajectories of ants displaced sideways. (B) Example paths of ants that had no loops (green) and one or more loops (red) are shown. Grid size is 1 m². Inset: Orientation of the ants at 0.5 m (inner circle) and 5 m from the release point. Mean vector and length of the mean vector r are shown. The arrowhead indicates the true nest direction, Nest , from the point of release.