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Continuity mistake: In the living room when Melanie puts the cage down, the left side extends over the edge of the seat. In the next shot as she puts the card next to it, the cage doesn't extend over the edge of the seat anymore. (00:22:25)

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Continuity mistake: As Mitch brings the little girl in the blue dress back to the house the doorknob appears between shots. (00:53:10)

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Continuity mistake: As Melanie talks about renting the apartment Annie's hair changes slightly between shots. Two little pieces of hair stick out right by her left ear that weren't there in the previous shot when she opens the door. Annie's hair changes in other consecutive shots throughout the film. (00:31:50)

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Continuity mistake: You can tell by the shadows on the wall that the headboard of Lydia's bed is pushed up further against the wall in the overhead shot. (01:04:00)

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Continuity mistake: The wire attached to the roof of the Bodega Bay School that the birds sit on as Mitch and Melanie watch was not there earlier in the movie. We see this left corner of the building up close twice earlier in the movie. The first is when Melanie drives up to Annie's and the second even better shot is when Annie stands by her mailbox as Melanie leaves. (01:29:35)

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Continuity mistake: When Melanie first shows the two birds in the cage to Mitch they change in the next shot. In the close-up they have a distinctive dark yellow patch on their tail feathers that the previous birds didn't have. (00:05:30)

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Continuity mistake: Melanie closes the door of the phone booth with her right hand pushed up against the window, and in the next shot her right hand is tucked up close to her body touching the center of the phone booth door. While inside, Melanie goes from leaning against the door to leaning against the opposite window between shots. (01:26:25)

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Continuity mistake: When Melanie walks up the dock to Mitch's house there's a tower (to the left of her head) on the far side of Bodega bay. Two shots later a sailboat appears on the other side of the bay, slightly to the left of the tower, that wasn't there before. (00:21:55)

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Continuity mistake: As Annie goes back to sit down on her couch she says, "Then one weekend he invited me up to meet Lydia". The silver box in front of the three-pronged lamp on her table moves between shots. (00:42:55)

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Continuity mistake: Annie's sweater and face go from having no sunlight on them to being in the sunlight, before she moves towards Cathy as the birds attack the party. (00:51:55)

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Continuity mistake: As Melanie rings Annie's doorbell, there's a distinct reflection in the door. Later when Annie walks up onto the porch there's no reflection in the window of the door because they've been removed. (00:16:30)

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Continuity mistake: A blond boy in a light brown shirt is attacked by a crow and goes from having no blood on his neck to having a lot of blood smeared on his neck between shots. (01:14:10)

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Continuity mistake: As Melanie approaches Mitch's house for the first time we see one single fence around the yard where the children are attacked by the birds in the party scene. Later in the movie there's a double fence there. (00:21:35 - 00:52:35)

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Continuity mistake: As Melanie takes the tea into Lydia's room, the tea pot changes positions between shots. First the handle is to Melanie's right, then as she walks into the room it's facing her. (01:02:35)

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Continuity mistake: When Mitch asks Melanie how you can tell if birds are molting, the canaries behind her are perching above her head. In the next shot of both of them together, they're still right up against the cage but the perch is lower. (00:05:20)

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Continuity mistake: As Mitch and Melanie walk down the hill to the party the sun is behind them casting the shadows of the children towards the house. Three shots later in the close-up of Cathy the sun is in the opposite direction coming from across the bay. (00:52:00)

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Continuity mistake: We see Melanie run to help the girl in the blue dress twice. The first time she starts out from the middle of the yard and almost gets to her. The second time she starts from further back near the lawn chairs. (00:52:35)

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Continuity mistake: As Melanie plays the piano, the shadow of the picture of her father on the wall gets longer and shorter between shots. (00:36:25)

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Continuity mistake: The position of Melanie's car has changed from when she first parked it in front of Annie's house. At first the rear wheels are adjacent to the steps, but later they've been moved back slightly so the front seat is adjacent to the steps for Annie to lean in when they speak. (00:18:10)

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Continuity mistake: As Melanie approaches the boat keeper her pocketbook is hanging around her wrist. In the next shot as she speaks to him the pocketbook is in the crook of her arm. (00:20:00)

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