Neurochemical correlates of behavior.
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D001717:Birds; D001923:Brain Chemistry; D012701:Serotonin / Q000378:metabolism*; D014364:Tryptophan / Q000494:pharmacology*
D012701:Serotonin; D014364:Tryptophan