Trivia: Tippi Hedren actually received a cut on her face by a bird in one of the shots.
Trivia: Julie Harris was very aloof during filming and would often ignore her co-stars behind the scenes - especially Claire Bloom. Bloom felt very hurt by this. However, after filming, Harris showed up at Bloom's house with a gift and revealed that she actually really liked Bloom and her other co-stars. She behaved as she did during filming because she was trying to stay in-character between takes, and was worried that her performance as an outsider would suffer if she was friendly with her co-stars.