The Imperial Cormorant or Shag (Leucocarbo atriceps albiventer) on the Falkland Islands is part of a complex of related cormorants found on southern South America, the Antarctic Peninsula and on several subantarctic islands. On the Falklands these birds nest in large mixed rookeries close to the ocean, particularly with Southern Rockhopper Penguins (Eudyptes chrysocome). Shag nests are a cone of seaweed and other plant material cemented with mud and excreta, and between one and three chicks are raised. The adult Shags commute to sea each day, often fishing together in large flocks. The mixed rookeries are very busy and noisy, with adult birds coming and going, feeding chicks and squabbling with each other over pieces of nesting material. This breeding colony is on the clifftop at Cape Bougainville on East Falkland. There is much activity as the adult Shags incubate eggs, rear and shelter their chicks from the incessant summer wind, and fly to and fro from the sea. An adult Shag flew in with a large piece of brown seaweed for its nest, but a bird on the nest next door grabbed it, and after a struggle stole the seaweed and began adding it to its own nest.