The visual pigments, oil droplets and spectral sensitivity of the pigeon.
D000818:Animals; D003118:Color Perception / Q000502:physiology*; D010856:Columbidae / Q000033:anatomy & histology*; D009821:Oils / Q000032:analysis*; D010786:Photoreceptor Cells / Q000032:analysis*; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry; D014785:Vision, Ocular
D009821:Oils; D012168:Retinal Pigments