Visual Fields in Short-Toed Eagles, Circaetus gallicus (Accipitridae), and the Function of Binocularity in Birds

  title={Visual Fields in Short-Toed Eagles, Circaetus gallicus (Accipitridae), and the Function of Binocularity in Birds},
  author={G. R. Martin and G. Katzir},
  journal={Brain, Behavior and Evolution},
  pages={55 - 66}
  • G. R. Martin, G. Katzir
  • Published 1999
  • Biology, Medicine
  • Brain, Behavior and Evolution
  • Visual fields were determined in alert restrained birds using an ophthalmoscopic reflex technique. The region of binocular overlap is relatively small: maximum width of 20° occurs approximately 15° below the horizontal, and the field extends vertically through 80° with the bill tip placed close to the centre. Monocular field width in the horizontal plane is 139°, and the field is asymmetric about the optic axis. The cyclopean field extends through 260°, and the blind area above and behind the… CONTINUE READING
    105 Citations
    Visual fields and their functions in birds
    • 124
    • Highly Influenced
    Visual fields in hornbills: precision‐grasping and sunshades
    • 53
    • Highly Influenced
    • PDF
    Feeding methods, visual fields and vigilance in dabbling ducks (Anatidae)
    • 85
    • Highly Influenced
    • PDF
    Ecomorphology of eye shape and retinal topography in waterfowl (Aves: Anseriformes: Anatidae) with different foraging modes
    • 37
    • PDF
    The subtlety of simple eyes: the tuning of visual fields to perceptual challenges in birds
    • G. R. Martin
    • Mathematics, Medicine
    • Philosophical Transactions of the Royal Society B: Biological Sciences
    • 2014
    • 40
    • PDF


    Visual fields and eye movements in herons (Ardeidae).
    • 51
    Eye structure and amphibious foraging in albatrosses
    • G. R. Martin
    • Geography
    • Proceedings of the Royal Society of London. Series B: Biological Sciences
    • 1998
    • 46
    The eye of the humboldt penguin, Spheniscus humboldti: visual fields and schematic optics
    • G. R. Martin, S. Young
    • Geography, Medicine
    • Proceedings of the Royal Society of London. Series B. Biological Sciences
    • 1984
    • 72
    • PDF
    The visual fields of the tawny owl, Strix aluco L
    • 82
    Conjugate and disjunctive saccades in two avian species with contrasting oculomotor strategies
    • J. Wallman, J. Pettigrew
    • Biology, Medicine
    • The Journal of neuroscience : the official journal of the Society for Neuroscience
    • 1985
    • 75
    • PDF
    Total panoramic vision in the mallard duck,Anas platyrhynchos
    • 46
    Binocular stereopsis in an insect
    • 131
    Stereopsis in toads
    • 155