Fig. 1. Diagram showing the relative positions of the start of the trajectory, the cylinders (black circles) and the two feeding sites (F1 and F2). The directions of the first (b) and second (c) segments of a path and the direction of the path until the turn (a) are shown superimposed upon a trajectory recorded during training to F2. The turn is where the trajectory abruptly changes direction towards F2. The turn's magnitude is shown by the angle and its direction relative to F2 by the angle .