Adult beachmaster bull southern elephant seal (Mirounga leonina) holding female down with his weight, South Georgia, Polar Regions

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

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Lappet Faced Vultures feasting on an animal carcass, Grumet, Tanzania, East Africa

Giraffe in Moremi National Park, Botswana

Olive Baboon glaring at Vervet Monkey (Green Monkey), Grumeti, Tanzania

Elephants in Moremi National Park, Botswana

Mother elephant and calf feed in woodland in Moremi National Park, Botswana

Herd of three giraffes in Moremi National Park, Botswana

A herd ofGiraffes in Moremi National Park , Botswana

Giraffe in Moremi National Park, Botswana

Pack of timber wolves (canis lupus) asserting hierarchy, captive

Polar Bear (Ursa maritimus) on sea ice off the sub-arctic coast of Hudson Bay, Churchill, Manitoba, Canada. Bears come to the coast of Hudson Bay in Fall waiting for the ice to freeze, and looking for a careless seal or dead whale to wash up. Global warming has shortened their winter so they are increasingly anxious as they wait for winter. While they wait, they engage in frequent wrestling matches to determine a mating hierarchy for the breeding season in March and April, and regularly check on the ice to see if it will carry them out to sea.

Mackenzie valley wolves, canadian timber wolves (Canis lupus occidentalis), young wolves, hierarchy fights, biting

Combat of queens, Swiss cow fighting, cow fighting arena Aproz, Valais, Switzerland

Combat of queens, Swiss cow fighting, cow fighting arena Aproz, Valais, Switzerland

Mackenzie Valley Wolves or Canadian Timber Wolves (Canis lupus occidentalis) fighting to determine hierarchy with threatening gestures

Canadian timber wolves (canis lupus occidentalis) in winter

Alpine ibex (Capra ibex), also steinbock or Ibex, fighting for rank, High Tauern National Park, Carinthia, Austria, Europe

Alpine ibex (Capra ibex), also steinbock or Ibex, fighting for rank, High Tauern National Park, Carinthia, Austria, Europe

Alpine ibex (Capra ibex), also steinbock or Ibex, fighting for rank, High Tauern National Park, Carinthia, Austria, Europe

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

Southern Giraffes (Giraffa camelopardalis giraffa), fighting males in the dry and barren Auob riverbed, Kalahari Desert, Kgalagadi Transfrontier Park, South Africa, Africa

Fighting wolves in winter (canis lupus occidentalis)

Burchell's Zebras (Equus quagga burchelli), adult, two males fighting, social behavior, Kruger National Park, South Africa, Africa

Angolan Giraffes (Giraffa camelopardalis angolensis), two bulls fighting, Moremi Wildlife Reserve, Ngamiland, Botswana, Africa

Southern Giraffes (Giraffa camelopardalis giraffa), fighting males in the dry and barren Auob riverbed, Kalahari Desert, Kgalagadi Transfrontier Park, South Africa, Africa

Southern Giraffes (Giraffa camelopardalis giraffa), fighting males in the dry and barren Auob riverbed, Kalahari Desert, Kgalagadi Transfrontier Park, South Africa, Africa

Impalas (Aepyceros melampus), two males fighting, Sabi Sand Game Reserve, Kruger National Park, South Africa, Africa

African elephants (Loxodonta africana) fight, Nxai Pan National Park, Ngamiland, Botswana, Africa

African elephants (Loxodonta africana) fighting at a waterhole, Nxai Pan National Park, Ngamiland, Botswana, Africa

Wallabies (Macropus agilis) fighting on a meadow, Queensland, Australia, Oceania

Impalas (Aepyceros melampus), two bucks fighting, Chobe River Front, Chobe National Park, Chobe District, Botswana, Africa

Grey Wolves (Canis Lupus) Demonstrating Hierarchy, Montebello, Quebec, Canada

Spotted hyena or laughing hyena (Crocuta crocuta) showing submissive behaviour by flattening the ears and showing teeth. Mpumalanga. South Africa.

Big male of chimpanzee (Pan troglodytes) on mangrove branches. Republic of the Congo. Conkouati-Douli Reserve.

Eastern moose (Alces americanus) males confront each other on a snowy forest track after the rutting season. A friendly fight that allows the dominant male to consolidate his stature. Parc de la Gaspesie. Quebec. Canada

Red deer (Cervus elaphus) stag fighting, England

Muskox or Muskoxen (Ovibos moschatus) bulls fighting in deep snow during winter. Bardu, Polar Park, Norway, Scandinavia, Europe

Red deer (Cervus elaphus) facing each other before a fight at sunset during the bellowing period.

Couple of wolfs (Canis Lupus) on snow, captive, Sumava National Park, Bohemian Forest, Czech Republic, Europe