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Continuity mistake: Early in the movie Melanie makes a right turn as she goes up to Annie's house and we see a white post on the school side of the street and a stop sign on the opposite side. Now as she drives up to the school to check on Cathy we see the exact same spot and there's no stop sign. (01:08:10)

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Audio problem: When the uptight mom asks how to get to San Francisco the guy at the bar that offers to take her lifts his glass up to take a drink and then we hear the overdub of the ice jangling in the glass. The jangling continues into the next shot after the glass is stationary and no longer near his lips. (01:22:10)

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Continuity mistake: In an earlier scene as Melanie plays the piano and Cathy stands there look closely at the drapes on her left. In that scene the drapes were right up against the edge of the wall, now as Mitch checks the windows before the last attacks they're pushed back several feet. (00:57:30)

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Continuity mistake: As Melanie drives up the main street of Bodega Bay a kid on a bike appears riding behind her between shots. He wasn't there in the previous shot when they show her behind the steering wheel and we can see back behind her car. (00:12:05)

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Continuity mistake: When Mrs. Bundy tells Melanie that there is a difference between crows and black birds Deke's right arm is leaning on the recessed edge of the bar close to his body. In the next shot his right arm is moved closer to Melanie, placed in the middle of the bar. (01:16:30)

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Continuity mistake: As Melanie talks to her father on the phone, Mrs. Bundy walks into the restaurant and an ash tray that Melanie and Deke didn't touch appears right next to the phone between shots. (01:16:10)

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Continuity mistake: The gas station attendant is standing on a red hose as the bird hits him. The next time we see him he's out cold but the red hose has been neatly wrapped up even though no one went near it. (01:24:35)

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Continuity mistake: The store manager has a pencil in his chest pocket when he finishes speaking to Melanie outside the store. Even though he never touches it it's shorter as he talks on the phone to the boat keeper. (00:15:00)

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Continuity mistake: Melanie's car was dirty from the long drive up the coast as she parked in front of the general store. She drove directly to Annie's house past the Bodega Bay School and all the dirt has now disappeared. (00:16:05)

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Continuity mistake: As they all walk up the steps to have dinner Lydia's sweater is rearranged. The button on the right side of it disappears under her collar between shots. (00:33:20)

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Continuity mistake: When we saw the phone booth earlier in the movie it was sitting on rock now as Melanie runs inside it for protection from the bird attack it's sitting on asphalt. (01:26:15)

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Continuity mistake: As the school children are running down the hill a white fence appears between shots in the background on the right of the screen. (01:13:40)

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Continuity mistake: As she's fighting off of the bird attack in the bedroom Melanie looks like she is turning off the light switch on her right. There's no power in the house but the light on her does go out. It's not a reflection from the flashlight, which is aiming at the ceiling before the light goes out. (01:48:30)

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Continuity mistake: In his bedroom when Lydia sees Mr. Faucet's body with his eyes pecked out. Watch very closely and you can see his left foot move. (01:00:30)

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Continuity mistake: When Melanie gets up and looks at the birds massed on the monkey bars the area behind her is a tree and a field. This background changes entirely when she and Mitch walk up to find Annie's body and there is what looks like a junk yard with a valley behind it. (01:11:20 - 01:30:00)

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Continuity mistake: In a close-up of Melanie in the phone booth after a blue and white car crashes into the orange car look at the left side of the screen. You'll see the stop sign that the blue and white car just knocked over back up where it was seconds before. (01:26:40)

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Continuity mistake: In the upstairs bedroom attack the first blackbird scratches Melanie's face and her left hand goes from pointing upward to pointing across her face between shots. (01:47:50)

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Continuity mistake: The windshield of a blue and white car that crashes into a stop sign gets broken on the left side. In the next shot as Melanie looks at it up close from the phone booth it's not broken. (01:26:30)

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Continuity mistake: As they all prepare to leave the house part of Melanie's bloody dress sticks right up towards her chin, but when Mitch and Lydia swing her around towards the car it's not sticking up anymore. (01:56:10)

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Continuity mistake: As Mitch leaves the house to get Melanie's car in the garage the large brown wooden chair that has been to the right of the door throughout the movie has disappeared. (01:52:40)

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