title: A further look at the binocular visual field of the pigeon (Columba livia).
abstract: The binocular visual field of the pigeon, measured ophthalmoscopically, is ovoid in shape. It is 114 degrees in vertical extent and centered and widest (37 degrees) about the eye-beak axis (i.e. the line passing through the straight edge of the beak and the midpoint of a line connecting the centres of the pupils). The area dorsalis projects 10 degrees-15 degrees below the eye-beak axis where the field is 35 degrees wide. The stereotyped peck response of the pigeon entails birds pausing twice. At the first fixation, the image of a grain is on the area dorsalis and at the final fixation the grain is centered within the widest part of the binocular field.
mesh_terms: D000818:Animals; D010856:Columbidae / Q000502:physiology*; D003867:Depth Perception / Q000502:physiology; D004435:Eating; D012018:Reflex / Q000502:physiology; D012160:Retina / Q000502:physiology; D014794:Visual Fields