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Fig. 4. Results of Experiment 2. Bees were trained and tested in an axially striped
tunnel. (A) Bees tested without the landmark generally flew from one tunnel
end to the other. (B-D) Bees tested with the landmark at the training site
(B), shifted to unit 14 (C) and shifted to unit 4 (D), all made first turns
near the landmark then tended to break visual contact on second turns (and
often flew back to the entrance). For an explanation of figure layout and
symbols, see Fig. 2.