Fig. 4. Results of Experiment 3. Bees trained at unit 10 and then tested in (A) the training tunnel following a `dummy shift', (B) the training tunnel following no shift, (C) a tunnel in which bees were trained at unit 5 and (D) a fresh tunnel devoid of scent. Bees in C searched at a significantly shorter distance than in A, B and D, indicating that scent `pulled' searches towards unit 5. Inverted triangles, training location with scent; diamond, scent location; squares, training location without scent. See Fig. 2 for further details.