I think my favorite Hitchcock films are Psycho and The Birds, whenever someone askes me what my favorite horror film is, I always say Alfred Hitchcock's Psycho ,and don't even get me started about the 1998 remake of that film, it was terrible,it went by a bit too fast(the reason the original was so slow was to build up tension) and I'm pretty sure Vince Vaugn as Norman Bates is pretty laughable(there is only one Norman Bates and his name is Anthony Perkins), I thought 2, 3 and 4 were great but they're nothing compared to the original.
The Birds is s film about raven-like birds, turning into fiends and attacking...well...whatever there is to attack, my favorite scene in that film has to be when the school children are running to there homes while being chased by the birds,which were swooping down at the kids, sometimes tearing there backpacks,cutting them with their talons, it was intense and had me on the edge of my seat the entire time.