Iso-azimuth and iso-elevation lines demonstrating the extent of the visual field representation in two birds.

<p>Red complete lines denotes the iso-azimuth lines- a combined representation of maps obtained by visually stimulating with azimuth stimulus from different monitor positions. Green lines denotes iso-elevation lines- a combined representation of maps obtained by visually stimulating with an elevation stimulus from different monitor positions. <b>A—</b>bird 1, visual stimulation (both azimuth and elevation stimuli) from 0°-90°, fronto-lateral limit from -5°-+125° and vertical limit from 0°-+25°. <b>B—</b>bird 2, visual stimulation (both azimuth and elevation stimuli) from 0°-90°, fronto-lateral limit from 20°-+110° and vertical limit from 0°- +25°. Scale bar = 500 μm.