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Fig. 3. Approach flights of a single bee trained with a black square landmark
located behind the food hole (shown in black; position 1 in inset of
Fig. 1) and tested with the
landmark shifted to 20° (yellow), 10° (blue), 0°
(black, control), 10° (red) and 20° (green) with respect to training
position, as seen from the entry position (small black square). (A) Typical
sample flights. (B) Median approach flights. Trajectories are shown with thick
lines where the approach direction differs significantly from the control
(WatsonWilliams test for two samples, P=5%;
Zar, 1999). Total number of
flights analyzed was 47.