Role of light in the photoperiodic responses of migratory birds.
D000818:Animals; D001717:Birds; D002940:Circadian Rhythm; D003624:Darkness; D005223:Fats / Q000378:metabolism*; D006066:Gonads / Q000502:physiology*; D008027:Light; D050356:Lipid Metabolism; D046109:Passeriformes; D017440:Photoperiod
D005223:Fats
DARKNESS/effects; FATS/metabolism; GONADS/physiology; LIGHT/effects