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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.