The Chilean Skua is a large predatory seabird

Seabird

Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

, which breeds in Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 and Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

, but ranges as far north as Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 and Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 when not breeding. A relatively distinctive skua

Skua

The skuas are a group of seabirds with about seven species forming the family Stercorariidae and the genus Stercorarius. The three smaller skuas are called jaegers in North America....

, it has a dark cap that contrasts with its cinnamon throat and lower face. Hybrids with the Brown Skua

Brown Skua

The Brown Skua , also known as the Antarctic Skua, Southern Great Skua, Southern Skua, or Hākoakoa , is a large seabird that breeds in the subantarctic and Antarctic zones and moves further north when not breeding...

 are known from southern Argentina.

While nowhere near the size of birds such as the Wandering Albatross

Wandering Albatross

The Wandering Albatross, Snowy Albatross or White-winged Albatross, Diomedea exulans, is a large seabird from the family Diomedeidae, which has a circumpolar range in the Southern Ocean. It was the first species of albatross to be described, and was long considered the same species as the Tristan...

, the Chilean Skua makes up for it in sheer aggression towards other birds. Chilean Skuas have been known to fly in large groups (dubbed 'wolfpacks' by a Scottish whaler

Whaling

Whaling is the hunting of whales mainly for meat and oil. Its earliest forms date to at least 3000 BC. Various coastal communities have long histories of sustenance whaling and harvesting beached whales...

who observed the birds in action) and hunt other seabirds. They also eat offal, rodents and carrion.