Trivia: Tippi Hedren actually received a cut on her face by a bird in one of the shots.
Trivia: When we see the school children running away from the birds, they were actually running on a treadmill with Bodega Bay footage added in the background.
Trivia: Although it lasts for only several minutes on screen, the scene where Tippi Hendren is attacked by the birds in the bedroom took seven days to film.
Trivia: There is no then-usual "THE END" title card as Alfred Hitchcock wanted to imply that the terror would continue without end.
Trivia: There is no musical score for the movie.
Trivia: When Melanie first walks into the pet shop, you can see Alfred Hitchcock walk out. He is walking two small dogs. They were his real pets.
Trivia: When Mitch carries Melanie down the stairs after the attack of the birds in the bedroom, the woman you see is not Tippi Hendren but her stand-in. Hendren was in hospital suffering from exhaustion after filming the scene.
Trivia: Mitch's sister, Cathy Brenner, is played by a then very young Veronica Cartwright in her first horror role, who went on to star in other horrors, often alien-related: the 1978 remake of Invasion of the Body Snatchers as the sole surviving human, Nancy, in Alien as the character of Lambert and play a recurring abductee character on the long running series, The X-Files.
Suggested correction: Sorry, maybe I'm missing something, but how is this trivia? Actors and actresses star in multiple movies. The three mentioned are not related or even similar. I don't see how this is trivia.
I felt that it is trivia to know that this actress continued to stay active in the horror/thriller genre...different, important roles. Some of her fans might not have even recognized her starting out in The Birds.
This isn't a trivia about the movie itself though. Trivia about cast members is acceptable if their role reflects or references a previous work, but not future works. And simply listing a person's acting resume isn't trivia without it being relevant to the film itself. For example, if an actor from an original TV show or movie appears in the reboot, you can list that as trivia for the reboot, but it wouldn't be trivia for the original. Plus, the film "The Birds" isn't an alien-based horror film.
Trivia: This was the final Alfred Hitchcock movie to be nominated for an Oscar.