The visual acuity of the pigeon for distant targets.
D000818:Animals; D010856:Columbidae; D004192:Discrimination, Psychological; D004215:Distance Perception; D008266:Macula Lutea / Q000033:anatomy & histology; D011601:Psychophysics; D011930:Reaction Time; D012160:Retina / Q000033:anatomy & histology; D014792:Visual Acuity