The visual pigments of several species of birds.
D000042:Absorption; D000818:Animals; D001717:Birds; D004071:Digitalis Glycosides; D009821:Oils / Q000032:analysis; D010578:Petroleum; D012160:Retina / Q000032:analysis; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry; D013501:Surface-Active Agents
D004071:Digitalis Glycosides; D009821:Oils; D010578:Petroleum; D012168:Retinal Pigments; D013501:Surface-Active Agents