- Tippi Hedren was actually cut in the face by a bird in one of the shots.
- There is no musical score for the film.
- at the start of the film walking two dogs past the pet shop (the dogs were actually his own).
- Hitchcock tried to hire Joseph Stefano (writer of Psycho (1960)) to write the script, but he wasn't interested in the story. The final screenplay (from a Daphne Du Maurier story) was written by Evan Hunter, best known to detective story fans under his pen name "Ed McBain".
- Hitchcock spotted Tippi Hedren in a diet drink commercial.
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