Richard Du Toit / Impala (Aepyceros melampus) males fighting, Mkhuze Game Reserve, KwaZulu-Natal, South Africa

David Fleetham / Great white shark (Carcharodon carcharias) breaking surface with mouth open. Guadalupe Island, Mexico.

Remi Masson / Pair of Pumpkinseeds (Lepomis gibbosus) mating, male chasing other individuals away, River Rhone, Rhone-Alpes, France, June.

Remi Masson / Male Common toads (Bufo bufo) fighting underwater during mating season, with a pair mating Ain, Rhone-Alps, France, March.

Dave Bevan / Slow motion clip of two pairs of Jackdaws (Corvus monedula) squabbling over nest site, Worcestershire, England, UK, May.

Alan Murphy/ BIA / Northern Cardinal (Cardinalis cardinalis) male and Pyrrhuloxia (Cardinalis sinuatus) male fighting, Texas

David Fleetham / Jaws and teeth of Stout Moray (Gymnothorax eurostus). Hawaii.

Sebastian Kennerknecht / African Elephant (Loxodonta africana) bulls fighting, Kruger National Park, South Africa

Sergey Gorshkov / Northern goshawk (Accipiter gentilis) flying with squirrel prey, Finland . March

Sergey Gorshkov / Northern goshawks (Accipiter gentilis) fighting over squirrel carcass, Finland, March.

Sergey Gorshkov / Black Grouse (Tetrao tetrix) males fighting at lek in the snow, Tver, Russia. April

Mark Raycroft / Elk (Cervus elaphus) bulls fighting, North America