Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

White-backed vultures (Gyps africanus) fighting, Zimanga private game reserve, KwaZulu-Natal, South Africa, Africa

Male Great frigatebird (Fregata minor) trying to steal nesting material from a red-footed booby, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult waved albatrosses (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Antarctic shag (Phalacrocorax (atriceps) bransfieldensis) at nesting site amongst gentoo penguins at Jougla Point, Antarctica, Polar Regions

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead fur seal pup at St. Andrews Bay, South Georgia

Northern giant petrel (Macronectes halli) scavenging and feeding on a dead fur seal pup at St. Andrews Bay, South Georgia

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead fur seal pup at St. Andrews Bay, South Georgia

Adult Grey-headed Albatross (Thalassarche chrysostoma) courtship display at Elsehul, South Georgia

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Adult king penguin (Aptenodytes patagonicus) amongst chicks at breeding colony at Gold Harbour, South Georgia Island, Polar Regions

Black-browed albatross (Thalassarche melanophrys) adult feeding chick at nesting site on West Point Island, Falkland Islands, South America

An adult brown skua (Catharacta antarctica) feeding on a dead elephant seal pup at St. Andrews Bay, South Georgia

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