Ole Jorgen Liodden / Arctic skua (Stercorarius parasiticus) in flight, Svalbard, Norway, August.

Michael Pitts / Gentoo penguins (Pygoscelis papua) calling and defending their eggs from Southern Skua (Stercorarius antarcticus) hunting for unattended eggs or chicks, Sea Lion island, The Falklands, South Atlantic.

David Tipling / Great Skua (Stercorarius skua) in flight low over water, Fetlar, Shetland, June

Sylvain Cordier / Falkland skua (Catharacta antarctica),chick, New Island, Falkland Islands

Sylvain Cordier / Falkland Skua (Catharacta antarctica), adult and chick, New Island, Falkland Islands

Sylvain Cordier / Falkland skua (Catharacta antarctica), adult with chick, Pebble Island, Falkland islands

Sylvain Cordier / Falkland Skua (Catharacta antarctica), chick walking around the nest, Pebble Island, Falkland islands

Sylvain Cordier / Falkland skua (Catharacta antarctica), adults with chicks, Pebble Island, Falkland islands

Sylvain Cordier / Falkland skua (Catharacta antarctica) adult with predated King cormorant / White bellied shag (Leucocarbo atriceps albiventer) egg, on Pebble Island, Falkland Islands

Sylvain Cordier / Falkland skua (Catharacta antarctica), adult predating an egg in a colony of White bellied shag (Leucocarbo atriceps albiventer) on Pebble Island, Falkland Islands

Sylvain Cordier / Falkland skua (Catharacta antarctica) flying with predated King cormorant / White bellied shag (Leucocarbo atriceps albiventer) egg in its beak, on Pebble Island, Falkland Islands

Sylvain Cordier / Falkland skua (Catharacta antarctica) adult with predated King cormorant / White bellied shag (Leucocarbo atriceps albiventer) egg, Pebble Island, Falkland Islands