I think it is AUK
First, there is no such bird as a "seagull". There are over 45 species of gulls. Gulls are related to terns and skuas.
A skua is a big long winged ocean bird.
The skua bird is sometimes called a scavenger.
A kind of sea bird.
The skua is considered a scavenger bird and they can be aggressive.
skua
You may be thinking of the skua bird.
i believe they live in Antarctica where it is cold
At certain times, a skua can be very mean. They will fight another animal or large bird over a dead animal.
Skua. The skua species are aggresive hunters, feeding on fish, and the eggs and young of other seabirds.
erne, tern, gull, skua
the cassowary and skua