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.

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: 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 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: 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: 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 going along the water in her hired boat, Melanie passes a pole bobbing about in the water. In the next wide shot the pole has vanished.

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: 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: As Melanie is inside of the phone booth a man with birds attacking him runs up to her and there is a clear shot of the road extending past the restaurant. When this spot is seen earlier as Mitch and Melanie walk into the restaurant it's entirely different with a bunch of telephone poles on the left.

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.

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: As Lydia runs into the house after arriving back home from the scene at Mr. Faucets house there's a brown shade at the top on the window to her right. Earlier after the party as she opens the curtain and looks outside from the dining room, the window has a drape and a curtain and no brown shade.

Continuity: The flashlight is aiming right at the doorknob before Melanie walks into the room. In the next shot, as she walks through the door (before they turn the spotlight on) there's no light because the flashlight is off and isn't pointing at the doorknob.

Continuity: In the scene with the policeman, Melanie suggests that she should stay for the night. Look closely at the mantle above the fireplace to in the right of the picture there is a jar with something sticking out of it. In the previous shot this jar is empty.

Continuity: 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.