Fig. 2. Search distributions when the relationship between the landmarks is as in training. (A) Boundary landmark training (BLT) with landmarks in the training configuration. (B) Isolated landmark training (ILT) with landmarks in the training configuration. (C) BLT with landmarks shifted 1 m away from the entrance. (D) ILT with landmarks shifted 2 m away from the entrance. Left: distribution of first turns (filled columns) and second turns (open columns) above a sketch showing the arrangement of landmarks on the walls of the channel. Bin size is 20 cm. Filled and open arrowheads show the mean position of the first and second turns respectively. Right: search distribution as defined by Srinivasan et al. (1997) and described in the Materials and methods section. The dashed vertical line in this and subsequent figures shows the position, relative to the closest boundary landmark, of the feeder in the training configuration. The pattern beneath each graph shows the succession of landmarks and panoramic contexts from the entrance at the left. The section of lighter pattern at the right shows the range of the positions of the channel end.