Adult great skua (Stercorarius skua) with recent kill in the Svalbard Archipelago, Norway, Scandinavia, Europe

Adult great skua (Stercorarius skua) with recent kill in the Svalbard Archipelago, Norway, Arctic, Europe

Adult great skua (Stercorarius skua) being harassed by Arctic terns (Sterna paradisaea) guarding their nest sites, Svalbard, Norway

An adult great skua (Stercorarius skua) in flight at Bjornoya, Svalbard, Norway, Europe

Young great skua (Stercorarius skua) on iceberg, Spitsbergen, Svalbard, Norway, Scandinavia, Europe

An adult great skua (Stercorarius skua) taking flight at Bjornoya, Svalbard, Norway, Europe

Great skua (Stercorarius skua), in blue summer sky, Hermaness National Nature Reserve, Unst, Shetland, Scotland, United Kingdom, Europe

Adult great skua (Stercorarius skua) being dive-bombed by defensive arctic terns (Sterna paradisaea) guarding their nest sites in the Svalbard Archipelago, Norway

Adult great skua (Stercorarius skua) being dive-bombed by defensive arctic terns (Sterna paradisaea) guarding their nest sites in the Svalbard Archipelago, Norway

Great skua (Stercorarius skua). Great skuas will often approach boats at sea in the hope of food and will kill other birds up to and including great black-backed gulls. Hebrides, Scotland

A Great Skua (Stercorarius skua) standing on grass habitat, Handa Island, Scotland.

A great skua on Handa Island, Scotland, United Kingdom, Europe

A great skua on Handa Island, Scotland, United Kingdom, Europe

Atlantic puffin (Fratercula arctica) on sea cliff top and great skua chasing gannet in seabird colony, Shetland Islands, Scotland, UK

Silhouette of a Great skua (Stercorarius skua) on the beach, Joekulsarlon, South Iceland, Iceland, Europe

Chick. Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

On nest eating egg of Black-browed albatross (Thalassarche melanophris). Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Chick. Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Chick. Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Chick. Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Preying on Gentoo Penguins (Pygoscelis papua) hovering over colony.. Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Falkland Skua or Brown Skua (Stercorarius antarcticus, exact taxonomy is under dispute). They are the great skuas of the southern polar and subpolar region. South America, Falkland Islands, January

Great Skua (Stercorarius skua), Shetland, Scotland

Great skua (Catharacta skua) in flight