Pattern discrimination in the near-ultraviolet by pigeons.
D000818:Animals; D010856:Columbidae / Q000502:physiology*; D005556:Form Perception / Q000502:physiology; D008029:Lighting; D010364:Pattern Recognition, Visual / Q000502:physiology; D012160:Retina / Q000502:physiology; D014466:Ultraviolet Rays