The master Morricone composes this splendid piece for "The Bird with the Crystal Plumage," undoubtedly one of Dario Argento's best films. It's truly the case to say that Ennio gives the "la-la" here sung by a female voice. That La-La will return in even more unsettling forms as a murderous nursery rhyme in the masterpiece of '75.

Ennio Morricone - L'uccello dalle Piume di Cristallo