Fig. 5. Images of subject 392 captured in our auditory two-alternative forced-choice (2AFC) experiment demonstrating how this subject tended to orient his beak to the right (45°) regardless of whether his body was oriented forward (A and B) or backward (C and D) on the starting perch. In all four images the left and right speakers were located beyond the top edges of the images. Head orientations obtained for subjects 325, 000 and 404 also occurred independently of body orientation.