The other day we had a "herd of birds" on the farm that flew back and forth from field to field and trees to trees. While it wasn't exactly Hitchcock type mean birds...
..there sure were a lot of them.
This group stayed around the farm for a couple of days and then either dispersed or left altogether.
As far as being a professional bird watcher, I'd say I fall decidedly short. More so along the lines of Mr. Hobbs in this Jimmy Stewart movie.