A group of male frigate birds with red throat pouches oversees females with chicks to prevent attack by predators, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

Southern Giant Petrels (Macronectes giganteus) attacking and eventually killing an imperial rock shag (Phalacrocorax atriceps) on a tiny offshore reef in the Beagle Channel outside Ushuaia, Argentina

A sign in St. Ives, Cornwall, England, United Kingdom, Europe

Pair of Skua's (Catharacta sp.) attacking and killing chinstrap penguin, Deception Island, Antarctica, Southern Ocean.

An Arctic tern attacking an intruder to its nest site on the Farne Islands in Northumberland, England, United Kingdom, Europe

Birds sculptures, by Fernando Botero, one destroyed by a bomb on a terrorist attack, San Antonio park, Botero square, Medellín, Colombia

Brown booby, Sula leucogaster, male pecking at female, St. Peter and St. Paul's rocks, Brazil, Atlantic Ocean

Golden eagle (Aquila chrysaetos) attacked by a jay, Extremadura, Spain, Europe

Black grouse, also blackgame or blackcock (Lyrurus tetrix) courting males in fighting stance, Hedmark, Norway, Europe

Great crested grebes (Podiceps cristatus) fighting, fight over territory, Hesse, Germany, Europe

An African harrier-hawk, Polyboroides typus, perched in a dead tree, two Burchell's starling, Lamprotornis australis, attack the hawk, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

Brown Booby on Water Surface, Sula leucogaster, Bikini Atoll, Micronesia, Marshall Islands

Secretary bird;Sagittarius serpentarius), moves in the savannah and kill a mourning dove Streptopelia decipiens), Shompole wilderness, Shompole Community, Kenya, East Africa, Africa

Secretary bird;Sagittarius serpentarius), moves in the savannah and kill a mourning dove Streptopelia decipiens), Shompole wilderness, Shompole Community, Kenya, East Africa, Africa

Secretary bird;Sagittarius serpentarius), moves in the savannah and kill a mourning dove Streptopelia decipiens), Shompole wilderness, Shompole Community, Kenya, East Africa, Africa

Secretary bird;Sagittarius serpentarius), moves in the savannah and kill a mourning dove Streptopelia decipiens), Shompole wilderness, Shompole Community, Kenya, East Africa, Africa

Black grouse (Lyrurus tetrix) fighting in lek in a snowy bog

Arctic tern (Sterna paradisaea) attacking attacks photographer defending chicks, blue sky, Inner Farne, Farne Islands, Northumberland, UK

A leopard seal, Hydrurga leptonyx, feeding on a gentoo penguin, Petermann Island, Antarctica.

Secretary bird;Sagittarius serpentarius), moves in the savannah and kill a mourning dove Streptopelia decipiens), Shompole wilderness, Shompole Community, Kenya, East Africa, Africa

Black Caracara (Daptrius ater) hooted in flight by aTropical Kingbird (Tyrannus melancholicus), Alter do Chao, Brazilian Amazon.

Challenge between buzzards (Buteo buteo) two buzzards fighting for the perch, Valli di Argenta, Ferrara, Italy