Continuity: When Tippi Hedren is having her head wound cleaned in the restaurant, Rod Taylor is wiping her blood off with a tissue but it does not actually come off; in the next shot, however, there is clearly no blood on her head.

Continuity: After Melanie has been bandaged up after her attack, she sits up on the sofa, and you can see two large bloody scratches on her left cheek. These scratches disappear when Mitch and Lydia walk Melanie outside to the car.

Continuity: When Lydia brings out Cathy's birthday cake, in a wide shot the icing is white, then in a closeup the icing is a pink colour.

Other: When Mitch is in the car, after listening to the radio he switches it off and the subtitles read 'Clicks of radio', yet it should be 'Clicks off radio.'

Revealing: The birds that attack the schoolchildren have no shadows.

Visible crew/equipment: In a scene where Melanie, Mitch and Cathy are walking to the building on the hill along side Melanie's car, you can see the camera move in the reflection on the side of the car.

Continuity: When Mitch and Melanie are talking in the café, the bottle of peroxide on the table moves from being near Mitch to near Melanie.

Continuity: All through the party scene, the balloons change position, and balloons disappear and appear too.

Continuity: Inside the restaurant Melanie talks to her father on the phone at the bar. The phone's chord changes position between shots. At first it's resting on her sleeve then in the next shot it's on her forearm.

Continuity: As Lydia carries the birthday cake out, the shades of the window behind her are open. When we see this window again a few seconds later as she runs into the house the shades are closed.

Continuity: The tall structure on the hill behind the swing set has a lot of clouds around it. When we see it seconds later the sky is clear.

Continuity: As Melanie and Mitch walk up the hill behind his house Bodega Bay is at very low tide with a lot of sand bars showing. When they get to the top of the hill it's high tide.

Continuity: Before Lydia walks into Mr. Faucet's room she looks to her left and her face is entirely illuminated by the light coming from his room. In the next shot as she walks in only the left side of her face is illuminated.

Continuity: 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.

Audio problem: When Annie says, "Did you drive up from San Francisco by the coast road?" her lips are mouthing something different.

Continuity: When Annie tells Melanie that she should go to Cathy's party the belt of her robe draped over her right knee moves between shots.

Continuity: As they all run into the house to get away from the birds the redheaded boy in the grey-blue suit disappears. He runs across the lawn at the same time as Annie and the two little girls with her and should arrive at exactly the same time but we never see him again. Mitch even looks around in his direction to see if there are any children still outside before he enters the house. The boy just disappears from this scene and is not in the last shot of everyone inside the house either.

Continuity: As Melanie opens the door to the bedroom there is no light except her flashlight but you can see two distinct reflections in the door knob, one of the flashlight and one of the studio light behind her.

Continuity: The blonde girl in the red with the red bows in her hair has a crow on her head that suddenly jumps to her right shoulder between shots.

Continuity: Melanie walks out from behind the desk and goes into the hallway to get the nightgown to show Annie. No one ever flicked a light switch, but the hallway is now very well lit up.