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

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Sperm Whale territorial fight, Physeter macrocephalus, Caribbean Sea, Dominica

Battle-scarred beachmaster southern elephant seal (Mirounga leonina) bellowing a challenger, Peggotty Bluff, South Georgia, Polar Regions

Female southern elephant seal (Mirounga leonina) with newborn pup as skuas (Catharacta antarctica) fight for the afterbirth, South Georgia

Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean

Gemsbok (Oryx gazella gazella), sparring, Kgalagadi Transfrontier Park, South Africa, Africa

Two adult male lions (Panthera leo), one wounded on the front after a territorial fight, Serengeti, Tanzania, East Africa, Africa

Two young polar bears (Ursus maritimus) in territorial disputel near Monacobreen Glacier, Spitsbergen in the Svalbard Archipelago, Norway

Two young polar bears (Ursus maritimus) in territorial disputel near Monacobreen Glacier, Spitsbergen in the Svalbard Archipelago, Norway

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

Red fox (Vulpes vulpes) fighting, Netherlands

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

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

Pair of Zebra (Equus grevyi) stallions rise on hind feet to kick and bite each other as they fight on the floor of Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Moose Sparring

Two Masai giraffe (Giraffa camelopardalis tippelskirchii) stand necking on savannah, Serengeti, Tanzania

Pair of Zebra (Equus grevyi) stallions fighting on dusty plains of Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Red fox (Vulpes vulpes) males in territorial confrontation. Montreal Botanical Garden. Quebec. Canada