I just witnessed an Oystercatcher getting taken down and eaten alive. As the MO seems to be with other Great Black-backed kills that I have witnessed. They always seem to sidle up to the unsuspecting victim and without bating an eyelid pounce and annihilate.
These gulls are just badass! I have some video footage which I will post later but for now, check out these photos. They tell a gruesome story.