Goofs

After two birds break the glass on the phone booth, it appears that the glass isn't shattered when Melanie is grabbed out of it.

When Melanie is approaching Mitch's house in the boat, and even while she's walking down his dock after leaving the love birds, his car is parked pointing directly out of the garage. But after she paddles away and he walks from the barn to the house, and for the remainder of the scene, the car is parked at an angle to the garage.

When the gas station attendant is hit by a gull, he falls face down, and his body is angled toward the camera. Mitch and some other men go to help him, and in the last shot of them together, he is face up and his body is angled to the left. There is quick cutting in this sequence, and not enough time between shots for the men to have moved the attendant.

Annie and Melanie open the door to Annie's house when a seagull hits it. As the door opens houses are clearly visible across the road, after they look up again from the dead bird the view is now the bay with no houses at all.

During the bird attack on the house, Melanie falls back, almost swooning and crushes a lampshade. But during the rest of the movie, the lampshade remains in perfect condition.

Even though later in the film it is shown that the birds can make their way into buildings, the bird attack scene at the schoolhouse makes no sense. Having the children run all the way down the road during the bird attack was far more dangerous than staying in the school, or if they wanted to seek shelter in a building without such large windows they could have run the much shorter distance to Annie's house just beyond the school.

The point of this was for Melanie and Annie to get the children to leave the school and head back to their homes in a quiet and orderly fashion; they did not anticipate the birds would attack straight away.

In town before going to Mitch's place, Melanie writes a note on her car on top of a brown envelope. She picks up the note and appears to leave behind the envelope on her car, which disappears in the next shot.

Melanie does pick up the brown envelope and puts it on the car's passenger seat, though her body obscures these actions from the camera.

When Melanie and Mitch ascend a small hill, Mitch says something to her, but the audio of his speech is muted.

This is deliberately meant to show Mitch just saying something that is not audible while he is showing her the topography of the area in the distance.

The woman in the diner says that everyone said it started when Melanie came to town, but there were several people who reported incidents that occurred earlier, or elsewhere.

Those other incidents that were reported were dismissed at hand (i.e. the seagulls were after the fish in the nets), there had been no evidence of a full-scale attack of birds in Bodega Bay prior to Melanie's arrival.

Melanie asks for Mitch's sister's name to write it on a card, but when she is told "Cathy", she doesn't ask how to spell it, even though there are at least four ways to spell it (Cathy, Cathie, Kathy, and Kathie).

It likely did not occur to Melanie that there could be other ways to spell it, she just chose the spelling that she assumed was correct. It's entirely possible she could have spelled it incorrectly, but that Cathy did not mind anyway.

When Mitch is boarding up the house, he does not even use nails for the last one. All he does is set the board on top of the bottom one and tap it with the hammer.

When Melanie and Mitch are together on top of the bluff at the children's party, each person casts two sets of shadows.

When Melanie is climbing upstairs we see her shadow on the wall, even though the only light source is the flashlight she is using.

After Melanie is attacked upstairs, the "blood" on her face is obviously just painted on, with no evidence of actual scratches. It's especially noticeable when the "blood" is being wiped off in a closeup.

When the children are running from the school while being attacked, the birds attacking them cast no shadows.

When Melanie is driving up the coast road, a shot shows the lovebirds sitting in their cage on the floor. The floor of the car shown looks nothing like what the floor of an Aston Martin from this era would look like.

Melanie is placed on the couch and when she comes round, she starts flailing her arms around as if trying to protect herself from the birds. Shadows of her arms are cast over the couch and her head but the only light is coming from the fire and Mitch is sitting on the edge of the couch between it and her.

Inside Mitch's house, after the windows are boarded up, an unlit wall lamp has its shadow cast on an adjoining wall despite the fact that the only lamp lit is suspended from the ceiling in the middle of the room.

Melanie goes upstairs to investigate a noise and is trapped in a bedroom and attacked by birds which have broken in through the roof. Mitch and his mother rescue her but with the electricity cut off they're reliant on oil lamps for illumination. As Mitch starts to carry Melanie down stairs his mother picks up the lamp holding it in front of her but her strong shadow cast against the wall is obviously from a film lamp behind her.

Invited to the Brenners' for dinner, Melanie plays the piano while Cathy talks to her. But Melanie's fingers don't match the melody, especially the right hand's higher notes.

When Melanie enters Bodega Bay School for first time, we can hear the child singing even when they turn around to see Melanie, and are clearly not moving their lips.

While Melanie is driving to Bodega Bay with the love birds, she is seen driving very fast and screeching around every corner, yet the road is gravel until she arrives within the town limits.

When Melanie is driving up the coast road, a shot shows the lovebirds sitting in their cage on the floor. Audio clearly has a gear shift sound, but the shadow of the gear shift never moves, nor is a shadow hand shown.

After Melanie delivers the lovebirds to the Brenner home, the camera follows her as she walks back along the jetty to her boat, with the dolly track clearly visible.

When Melanie is trapped upstairs flailing at the attacking birds with the "flashlight" the power cord is briefly visible entering her sleeve.

When the fire starts at the gas station and an overhead view is shown, you can see water spraying onto the fire from two directions. This, in spite of the fact that the fire has just begun and you cannot see fire engines. A few moments later, you can hear sirens as fire trucks arrive on scene.

When Melanie was driving her car to deliver the lovebirds, there's a shot of the front of the car and the camera is reflected in the window.

Twice in the movie, a kettle and serving carafe clearly show multiple bright studio lights reflected in them.