Extraretinal light perception in the sparrow. I. Entrainment of the biological clock.
D000818:Animals; D001683:Biological Clocks / Q000502:physiology*; D001717:Birds / Q000502:physiology*; D002940:Circadian Rhythm; D007259:Infrared Rays; D008027:Light; D009622:Noise; D013508:Ophthalmologic Surgical Procedures; D010465:Perception; D013696:Temperature; D014732:Vibration