Adult Antarctic skua (Catharacta spp) steals a penguin egg from its parent, Aitcho Island, South Shetland Islands, Antarctica, Southern Ocean, Polar Regions

Southern elephant seal (Mirounga leonina) bull with skua, Peggotty Bluff, South Georgia, South Atlantic Ocean, Polar Regions

Adult Subantarctic Skua (Catharacta antarctica lonnbergi) cleaning itself in glacier run off at Stromness Bay, South Georgia, Polar Regions

Adult Subantarctic Skua (Catharacta antarctica lonnbergi) on tussac at Salisbury Plain on South Georgia Island, Polar Regions

Adult Subantarctic Skua (Catharacta antarctica lonnbergi) on tussac at Salisbury Plain on South Georgia Island, Polar Regions

King penguin (Aptenodytes patagonicus) with skua at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

Southern elephant seal (Mirounga leonina) pup lips being probed by a brown skua (Catharacta lonnbergi), South Georgia, Polar Regions

South Polar skua (Stercorarius maccormicki), Telephone Bay, Deception Island, South Shetland Islands, Antarctica, Polar Regions

South Polar skua (Stercorarius maccormicki), Telephone Bay, Deception Island, South Shetland Islands, Antarctica, Polar Regions

South polar skua (Catharacta maccormicki) on snow, much lighter plumage cf to Brown skua, Ross Sea, Antarctica, Southern Ocean

South polar skua (Catharacta maccormicki) chick about to fledge, will have much lighter plumage cf to Brown skua, Ross Sea, Antarctica, Southern Ocean

Female Hooker’s Sea Lions (Phocarctos Hookeri) between birth giving and mating. Sandy Bay, Auckland Island, Subantarctic New Zealand.

South Polar Skuas (Catharacta Maccormicki) patrolling a colony of Hooker’s Sea Lions (Phocarctos Hookeri). Sandy Bay, Auckland Island, Subantarctic New Zealand.

Adult south polar skua (Catharacta skua maccormicki) on the wing and feeding after an iceberg break-up near Port Lockroy on the western side of the Antarctic Peninsula

Adult south polar skua (Catharacta skua maccormicki) on the wing and feeding after an iceberg break-up near Port Lockroy on the western side of the Antarctic Peninsula

Adult south polar skua (Catharacta skua maccormicki) on the wing and feeding after an iceberg break-up near Port Lockroy on the western side of the Antarctic Peninsula

Adult south polar skua (Catharacta skua maccormicki) on the wing and feeding after an iceberg break-up near Port Lockroy on the western side of the Antarctic Peninsula

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