Fig. 4. Results of experiments 2–4, the transfer tests at maze C. (A) Experiment 2: yellow and blue training patterns. The bees significantly reversed their pattern preference from the yellow vertical grating in the morning to the blue horizontal grating in the afternoon at the neutral location. (B) Experiment 3: yellow and blue patterns in the same orientation. The bees significantly reversed their colour preference from yellow in the morning to blue in the afternoon at the neutral location. (C) Experiment 4: black patterns. The bees significantly reversed their pattern preference from the vertical grating in the morning to the horizontal grating in the afternoon. N, number of individual bees attending the test; values are means ± s.e.m. See text for further details.