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Visual lateralisation in quails (Coturnix coturnix).

Antonella Valenti1, Valeria Anna Sovrano, Paolo Zucca

  • 1University of Calabria, Italy.

Laterality
|October 30, 2004
PubMed
Summary
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Young quails exhibit visual lateralization, with the right eye aiding in faster food object categorization. This bird behavior, observed in the pebble floor task, differs from adult quails and may involve brain hemisphere specialization.

Area of Science:

  • Avian vision
  • Comparative psychology
  • Neuroscience

Background:

  • Birds often rely on visual cues for foraging and object discrimination.
  • Visual lateralization, the differential use of eyes and corresponding brain hemispheres, is documented in various bird species.

Purpose of the Study:

  • To investigate visual lateralization in young quails (Coturnix coturnix) using a pebble floor task.
  • To determine if age influences visual lateralization in quails.
  • To explore the potential link between visual lateralization and hemispheric specialization in birds.

Main Methods:

  • Two-week-old and adult quails were trained on a "pebble floor task" requiring discrimination between food grains and pebbles.
  • Visual conditions included binocular vision, monocular vision with the right eye, and monocular vision with the left eye.

Related Experiment Videos

  • Pecking responses to grains and pebbles were recorded to assess discrimination accuracy and lateralization.

    • Main Results:

    • Young quails tested with binocular or right-eye vision showed enhanced grain pecking compared to left-eye vision.
    • Adult quails did not exhibit significant visual lateralization in this task.
    • Behavioral lateralization in young quails suggests a preference for right-eye input, linked to left-hemisphere processing for rapid visual categorization.

    Conclusions:

    • Young quails demonstrate visual lateralization in the pebble floor task, with the right eye and left hemisphere being more efficient for rapid food object categorization.
    • This age-dependent lateralization in galliformes species like quails may be transient and linked to developmental asymmetries in visual pathways.
    • Findings contribute to understanding the evolution of visual processing and brain lateralization in birds.