Great Skua, A.K.A. Bonxie

Big Burly Brute of a Bully, and those are its good points. I have seen them attack Gannets and drive them into the water then land on top of the Gannet repeatedly submerging the Gannet until it coughs up its dinner. I have also been on Canna and been dive bombed by them as I walked across the moor there, despite being well away from the nest and walking away.
Don't get me wrong, I think they are a magnificent Bird... just not a very nice one