One of the actresses says it: "Bill, you're a terrible shot". They fire and fire and fire and fire and fire and don't hit a single bird for the longest time. And this is inside a closed building. How did these huge birds get inside the building. And why in the world would any of these people, shooting a movie, have guns? And MULTIPLE of the people standing around had guns. And let's wave an umbrella at them. That will help. And when they hit the birds, they disintegrate! The just blow up without leaving any blood of bodies hanging around.
That's just one small bit of a horrible movie. Shy in the world is there no negative rating on this site. The birds just hover. They don't attack anyone. Just hover and seem mean but never dive down and do anything. Oh, wait, they figured out now to dive now. Evolution in action!! Oh, here's an idea, let's use Ju Jutsu on them.
This is so bad it is not even good. The birds are still flying but they just stop shooting and the birds disappear. Here's an idea. Don't shoot and they will disappear in the first place.
How awful. Really a waste of time unless you want a travelogue of the Universal back lot.