Bird brain switch leads to new song.
Barnes
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D000818:Animals; D001717:Birds / Q000502:physiology*; D001921:Brain / Q000196:embryology*; D002645:Chickens; D002678:Chimera; D003370:Coturnix; D009417:Nerve Tissue / Q000637:transplantation; D014828:Vocalization, Animal / Q000502:physiology*