Skuas are a group of birds of the genus Stercorarius. They live near the ocean and have an aggressive lifestyle. They chase other birds to steal their catches, and they do fight, kill and eat other seabirds. Their victims include gulls, terns, puffins, and penguins.
- Harrison, Colin J.O. 1991. In Encyclopaedia of Animals: Birds, (ed) Forshaw, Joseph. London: Merehurst Press, p109. ISBN 1-85391-186-0