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Visual lateralization and homing in pigeons.

Helmut Prior1, Roswitha Wiltschko, Katrin Stapput

  • 1Institut für Kognitive Neurowissenschaft, Biopsychologie, Ruhr-Universität Bochum, 44780 Bochum, Germany. helmut.prior@ruhr-uni-bochum.de

Behavioural Brain Research
|August 18, 2004
PubMed
Summary

Pigeon homing reveals visual lateralization, with the right eye showing superior navigation. This study demonstrates how eye dominance impacts spatial orientation and homing speed in birds.

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Area of Science:

  • Ethology
  • Neuroscience
  • Comparative Psychology

Background:

  • Pigeon homing is a complex spatial navigation task.
  • Visual lateralization, or brain hemisphere specialization, is observed in various animal behaviors.
  • Understanding visual lateralization in pigeons can shed light on avian navigation mechanisms.

Purpose of the Study:

  • To analyze the role of visual lateralization in pigeon homing performance.
  • To investigate how monocular vision affects initial orientation and homing speed.
  • To determine if right-eye or left-eye dominance influences navigation strategies.

Main Methods:

  • 13 releases of homing pigeons were conducted.
  • Birds were tested under binocular (control) and monocular (right-eye or left-eye covered) conditions.

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  • Key parameters analyzed included vanishing bearings, vanishing intervals, and homing speed.

    • Main Results:

    • Occluding either eye significantly impacted orientation and homing.
    • Vanishing bearings shifted towards the open eye's side, with longer intervals and reduced speed.
    • The right eye demonstrated superior performance, showing less deviation and variance in initial orientation and faster recovery.
    • Lateralization effects were independent of release site familiarity.

    Conclusions:

    • Visual lateralization is a critical component of pigeon homing, influencing directional orientation.
    • The right eye/left hemisphere appears dominant in processing navigational information.
    • Hemispheric specialization in magnetic compass orientation and optic flow adjustment may underlie these lateralized behaviors.