The Birds doesn't have any music in it - just a carefully composed set of sound effects - which really helps the atmosphere, I think. It makes it seem more realistic - That's what makes most of the movie so scary, actually. Birds won't just start attacking people, but they could. And what would we do? There are all kinds of birds out there - It would be the Bird Apocalypse! That's really scary!
The movie stars Tippi Hendron and Rod Taylor, who I think looks just like Cary Grant even though nobody else sees it, and they're very good. Alfred Hitchcock is in it at the very beginning, and apparently owns poodles, which makes sense, really. I really liked The Birds. It was really pretty scary, and it was well-done, and I've been watching the birds for signs of conspiracy ever since, so it was obviously effective. The acting is sort of outdated though, so seems kind of stiff, and it really needs to be restored. There are all sorts of little blips in the film and the color is really uneven from one scene to another. But boy is it scary.