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.

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

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.'

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: 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: 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: 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: 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.

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

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: As Annie opens the door and finds the dead bird on the floor, the background across the street changes from of a very dark house with two lights on to a moonlit road between shots.

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

Continuity: After talking to Mitch on the phone, as Melanie sits behind Annie's desk there are two pens on top of the sheets of paper to the left of the pencil holder that were not there before. Neither Annie or Melanie touched a pen or pencil in this scene.

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.

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 Mitch walks up to the garage door all the birds on the ground that are near him run away and there's nothing to his right except a garbage pail. Then just before he walks through the door two birds appear pecking at his feet.