What are the chances that an ornithologist happens to be wandering through Bodega Bay?
Though, to be fair, the chances of birds suddenly deciding to attack humankind aren't very good, either. If you're willing to accept killer birds, you might as well accept ornithologists in the local diner.
As a bird booster, Mrs. Bundy says it's unthinkable that birds of different types would flock together and become aggressive.
Credit Hitch for controlling himself and not having her killed off by marauding seagulls.