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

Adult gentoo penguin (Pygoscelis papua) amongst king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Gold Harbour on South Georgia Island, Southern Ocean, Polar Regions

Pheasant (Phasianus colchicus) courtship, territory, male, Texel, The Netherlands, Europe

Red Deer (Cervus elaphus), fighting stags, Copenhagen, Denmark, Europe

Eastern Gray Kangaroo (Macropus giganteus), two males fighting on a meadow, Great Otway National Park, Victoria, Australia, Oceania

Red fox (Vulpes vulpes) fighting, Netherlands

Red deer (Cervus elaphus) on a snowy meadow, captive, Bavaria, Germany, Europe

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