Though, to be fair, it sounded more like a high-pitched uueeeeaaaa uuuueeeeaaaa uuuueeeeaaaa!!!
The chicks seemed REALLY hungry. And seeing their mother eating a pigeon in front of them didn't help. So one of the chicks stampeded their mother, landed next to her on a very narrow perch, almost shoving her off, and began tearing into the pigeon.