Fig. 2. Trajectories of homebound ants in (A) an unfamiliar test field and (B) the familiar training field. Each line represents the path of an ant. (A) Trajectories of FvRm+ (N=24), FvRm– (N=17) and ZvRm+ (N=15) from release point R towards the fictive nest N*. (B) Trajectories of FvRm+ (N=20), FvRm– (N=20) and ZvRm+ (N=21) from the feeder F to the nest N. Route-marks for homing ants are shown as black circles. In FvRm– condition, the grey circles indicate the location of the route-marks that were removed during test conditions. Grid size is 1 m².