Adult arctic terns (Sterna paradisaea) in dispute on Flatey Island, Iceland, Polar Regions

Adult female lesser frigatebirds (Fregata ariel), in aerial combat, Niau Island, Tuamotus, French Polynesia, South Pacific, Pacific

Adult black-legged kittiwake (Rissa tridactyla) in combat with a second kittiwake near Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe

Two great crested grebe (Podiceps cristatus) in combat, in splendour, Chiemsee, Upper Bavaria, Bavaria, Germany, Europe

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe

White-tailed eagle (Haliaeetus albicilla) in aerial combat, Poland, Europe