Similarities in the color vision of pigeons and man.
D000818:Animals; D001522:Behavior, Animal; D003116:Color; D003118:Color Perception; D010856:Columbidae; D003213:Conditioning, Psychological; D004193:Discrimination Learning; D006801:Humans; D008297:Male; D010786:Photoreceptor Cells / Q000502:physiology; D010828:Physiology, Comparative; D012054:Reinforcement, Psychology; D014785:Vision, Ocular