Fig. 1. Schematic illustration of the set-up for scent-position experiments. The set-up and protocol were similar to those used in the dual-distance experiments. The main difference was that, in the scent-position experiments, two groups of bees were separately trained to forage in separate tunnels (Tunnels A and B). The rationale was to train bees to a particular location, thereby allowing bees to learn a specific odometry reading, and then to examine search behaviour in a situation where scent information conflicted with the odometry reading. To this end, bees were tested either (1) in their `own' training tunnel (e.g. Tunnel A) following a procedure to mimic shifting of the tunnel (dummy-shift condition), (2) in their own tunnel immediately following a training session (no-shift condition), (3) in the tunnel in which the second group of bees were trained at a different position (unit 5/10 tunnel condition) or (4) in a fresh tunnel (Tunnel C) devoid of scent (fresh tunnel condition).