Fig. 2. Performance of bees with 15 or 17 trials of training in stage 2. Top: training patterns in stages 1-3. B, blue; Y, yellow. Bottom: percentage correct choices of groups of eight bees plotted against trial number for the different stages. (A) Performance with 45° versus 135° gratings at the feeder and yellow versus blue at the nest in stage 2, and with 45° versus 135° at the feeder and 135° versus 45° at the nest in stage 3. In stage 2, bees were assisted in trials 1 and 2, so these trials are not plotted. (B) Performance with 45° versus 135° at both the feeder and the nest in stage 2, and with 45° versus 135° at the feeder and 135° versus 45° at the nest in stage 3. Bees were assisted for the first two trials of stage 1 and these are not plotted.