A view of bird's eyes -- Pigeons lock their eyes in place during flight

Ros, I. G.; Bhagavatula, P. S.; Biewener, A. A.

doi:10.64898/2026.01.07.698303

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bioRxiv · 10.64898/2026.01.07.698303

A view of bird's eyes -- Pigeons lock their eyes in place during flight

Ros, I. G.·Bhagavatula, P. S.·Biewener, A. A.

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Abstract

Vision in most animals follows a fixate-and-saccade pattern. Birds fixate their viewing direction, then rapidly shift this gaze through head and eye movements. We used a head-mounted eye-tracking system in flying pigeons to relate eye to head movement and map eye position within the head. After take-off, the birds increased pupil size and adopted a fixed and consistent eye position in their head. In different visual environments, eye position returned to within 1{degrees} during flight. When flying, the birds positioned their eyes close to the primary horizontal axes of their vestibular systems. Because visual neurons share a common reference frame with the vestibular system, a consistent flight gaze position may actively align vision with mechanosensation and facilitate perception of self-motion. One-Sentence SummaryA head-mounted eye-tracking system shows that pigeons adopt a consistent eye-in-head position during free flight

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Ros, I. G., Bhagavatula, P. S., Biewener, A. A.. 2026-01-08. A view of bird's eyes -- Pigeons lock their eyes in place during flight. https://doi.org/10.64898/2026.01.07.698303

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