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Continuity mistake: As the birds fly out of the fireplace the silver ashtray on the table to the right of Mitch moves closer to him. (00:54:35)

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Revealing mistake: As Lydia talks on the phone Mitch walks into and out again from the kitchen and you can see his shadow fall on the drapes to the right of the dining room table. Later on Cathy goes into the kitchen and right after Mitch sits on the piano stool look closely at her shadow. Though not as prominent as Mitch's it can be seen in the same place for 20 seconds as she waits for her cue to enter the dining room. (00:34:00)

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Continuity mistake: As Mitch checks everything in the kitchen he walks past the birdcage and looks in it. Look closely at the door of the birdcage as he walks around it. At first it's closed then in the close-up it's open. (01:38:00)

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Continuity mistake: When Melanie lets the bird go, her hands are at eye level. In the next shot they're totally over her head. (00:05:55)

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Continuity mistake: When Mitch picks up the mirror his right hand grabs one of the umbrellas hanging on the right of the mirror. It in the next shot the umbrella has disappeared. (01:43:30)

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Continuity mistake: Mrs. Bundy's handkerchief in the left pocket of her jacket changes from when we first see her walk into the restaurant. Then when the drunk at the bar starts reciting from the Bible, her handkerchief almost disappears and then reappears several shots later. (01:18:10)

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Continuity mistake: As Lydia cleans off the coffee table and walks out with the tray the green pillow on the left of the couch is at the center of the screen. No one touches it but a few shots later as Melanie brings Cathy back from the bathroom it's been fluffed up with the right corner now being higher than the left. (01:39:15)

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Revealing mistake: The crew rigged the explosion to start from under the car and not from the lit match which isn't thrown anywhere near where the explosion originates. (01:25:30)

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Visible crew/equipment: As Melanie parks in front of the general store stage lighting and the reflection of a crew member can be seen in her car door as she opens it. (00:12:20)

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Continuity mistake: Mitch picks up the table with both hands holding the legs and this is how he places it up against the fireplace. Later we see it again as everyone exits the house and the table has been moved 90 degrees so that one lone leg is now at the top. (00:55:15)

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Other mistake: In the long shot of Melanie just before she pulls into Bodega Bay there's a shadow of her car where it shouldn't be, moving from left to right about 100 feet in front of her just below the matte drawing of the background. (00:11:55)

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Continuity mistake: As Melanie approaches Annie's door, the shade goes up between shots. (00:31:05)

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Revealing mistake: The bird that Mitch catches under his hat is fake and doesn't move. However, in the next shot when he takes it out from under his hat the bird is real. There are numerous instances throughout the film where it is obvious that the birds are fake. (00:06:15)

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Continuity mistake: As everyone runs into the house there are four neat stacks of paper cups around the punch bowl. When we saw this spot before there were only two cups around the punch bowl and most of the other paper cups were stacked on trays and knocked over as a bird plowed into them. (00:53:05)

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Continuity mistake: As Melanie approaches Doodles Weaver to get her boat there are no lobster traps where he is standing. Two shots later she climbs down the ladder and there are two traps to the right of the ladder. (00:20:00)

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Continuity mistake: When we see Mitch's red barn up close the sun is not shining and there are clouds behind it. The next time we see it a few seconds later it's a bright sunshiny day with a blue sky behind it. (00:21:55)

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Continuity mistake: As Lydia carries the birthday cake out from the house the position of the vine growing on the pole on the right jumps from right to left between shots. (00:51:55)

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Continuity mistake: As Melanie pulls up in front of the general store there's guy on the right in a dark blue shirt who changes position between shots. (00:12:20)

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Continuity mistake: Melanie is only in Mitch's house for one minute, but the tide has already gone out enough to beach the other boat tied to the dock. (00:23:00)

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Deliberate mistake: It's supposed to be a moonlit night when Melanie walks into the bedroom. But when we see the opening where the birds got in there's a blue sky much brighter than it would actually be on such a night. (01:48:35)

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