Peter Cairns / 2020VISION / Great skua (Stercorarius skua) displaying, Shetland Isles, Scotland, UK, July

Peter Cairns / 2020VISION / Great skua (Stercorarius skua), Shetland Isles, Scotland, UK, July

Alex Mustard / 2020VISION / Great skua (Stercorarius skua) on water, Shetland Islands, Scotland, UK, April

Andrew Parkinson / Great skua (Stercorarius skua) territorial adult flying directly toward the photographer in a display of aggression. Shetland Islands, Scotland, UK, June. (non-ex)

Andrew Parkinson / Great skua (Stercorarius skua) attacking a sheep, in an attempt to prevent it wandering too close to its vulnerable chick. Shetland Islands, Scotland, UK, June (non-ex)

Andrew Parkinson / Great skua (Stercorarius skua) bathing in a freshwater pool. Shetland Islands, Scotland, UK, June. (non-ex)

Andrew Parkinson / Pair of Great skuas (Stercorarius skua) on a misty moorland with person walking close to their territory. Shetland Islands, Scotland, UK, June. (non-ex)

Andrew Parkinson / Breeding pair of Great skuas (Stercorarius skua) in a territorial display to warn off approaching Skuas, Shetland Islands, Scotland, UK, June. (non-ex)

Andrew Parkinson / Great Skua (Stercorarius skua) territorial adult displaying to other Skuas passing overhead by stretching out its wings and calling. Shetland Islands, Scotland, UK, June. (non-ex)

Jouan & Rius / Great Skua (Stercorarius / Catharacta skua) adult attacking to protect his chick, Shetland Islands, Scotland, UK

John Cancalosi / Great skua pair, aggressive display, Shetland Islands, Scotland.

Jessie Lane / Great skua, Godthill Harbour, South Georgia, Antarctica.