Field and experimental studies of the annual cycles of white-crowned sparrows.
D000413:Alaska; D000818:Animals; D001522:Behavior, Animal; D001717:Birds / Q000502:physiology*; D002170:Canada; D002940:Circadian Rhythm; D006066:Gonads / Q000378:metabolism; D008027:Light; D008800:Mexico; D010507:Periodicity; D012098:Reproduction; D012621:Seasons; D014481:United States