Fig. 3. Experiment 1. Scent-triggered navigation of groups of bees trained to a single feeder. Left: test results for bees trained to a rose-scented feeder (white). Right: test results for bees trained to a lemon-scented feeder (grey). The figure shows means ± S.E. of visits by marked bees to an empty, unscented test feeder during an 8 min no-scent interval (air, unfilled bars) and an 8 min scent interval, when the respective scent is blown into the hive (hatched bars). N=9 tests for each scent and each no-scent interval. Numbers above bars show P-values for tests of significant difference between air and scent (Wilcoxon Matched-Pairs test).