Bence Mate / European rabbits (Oryctolagus cuniculus) fighting each other, Kiskunsag National Park, Hungary. June. Winner, 2019 Cadiz Photo Nature Competition.

John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...

Ingo Arndt / Two Northern elephant seal (Mirounga angustirostris) males fighting for dominance, California, USA

Francois Savigny / Old African elephant bull in 'must', period of sexual dominance when he wil mate with females in his home range, Etosha National Park, S. Africa

Carol Walker / Two wild pinto Mustang stallions battle for dominance in Sand Wash Basin, Colorado, USA.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance, Cardiff, UK, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.

Cyril Ruoso / Bonobo (Pan paniscus) male and female copulating, Lola ya Bonobo Sanctuary, Democratic Republic of Congo

Ole Jorgen Liodden / Waved albatross (Phoebastria irrorata) pair in courtship display, Espanola, Galapagos Islands. Critically endangered species.

Suzi Eszterhas / Proboscis Monkey (Nasalis larvatus) dominant male, Sabah, Borneo, Malaysia

Markus Varesvuo / Black grouse (Lyrurus tetrix) mating in snow, Utajarvi, Finland, May.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs with mother 'T19 Krishna' in background, Ranthambhore National Park, India.

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their 'weed dance' in which they take a vertical position in front of each other and offer plant material to each other. The Netherlands. March...

Markus Varesvuo / Black Grouse (Tetrao tetrix) two males fighting, Liminka, Finland, March

Markus Varesvuo / Black Grouse (Tetrao tetrix) two males fighting, Liminka, Finland, March

Markus Varesvuo / Black Grouse (Tetrao tetrix) two males fighting, Liminka, Finland, March

Ammonite / African lioness (Panthera leo) growling and swatting at a sub-adult male approaching a kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Roland Seitre / Eastern Wolf (Canis lupus) showing submissive behavior to dominant individual, Omega Park, Montebello, Quebec, Canada

Laurent Geslin / Black backed jackals fighting {Canis mesomelas} Skeleton Coast, Namibia

Laurent Geslin / Black backed jackal, submission {Canis mesomelas} Skeleton Coast, Namibia

Laurent Geslin / Two male urban Red foxes, territorial posture at junction of territories {Vulpes vulpes} London, UK

Laurent Geslin / Two male urban Red foxes, mouths open, one in submissive posture {Vulpes vulpes} London, UK

Laurent Geslin / Two dominant male urban Red foxes fighting on road {Vulpes vulpes} London, UK

Laurent Geslin / Two dominant male urban Red foxes fighting on road, mouths open {Vulpes vulpes} London, UK

Laurent Geslin / Two dominant male urban Red foxes fighting on road {Vulpes vulpes} London, UK

Bence Mate / Grey heron (Ardea cinerea) standing on the neck of another Grey heron, Lake Csaj, Kiskunsagi National Park, Hungary

D. Parer & E. Parer-Cook / Eastern Grey Kangaroo (Macropus giganteus) males fighting for dominance and access to females, Maria Island National Park, Australia

Denis-Huot,Denis-Huot / Lion (Panthera leo) mating, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Anup Shah / Topi (Damaliscus lunatus jimela) two males sparring, with another approaching, Masai Mara National Reserve, Kenya. March

Christophe Courteau / Two African Buffalo {Sincerus caffer} bulls sparring, Okavango Delta, Botswana.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on rotten wood from a tree while his juvenile son 'Tembo' aged 4 years waits his turn, Bai Ho...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on rotten wood from a tree while female 'Malui' and their juvenile son 'Tembo' aged 4 years s...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on rotten wood from a tree while female 'Malui' and their juvenile son 'Tembo' aged 4 years s...

David Pattyn / Alpine ibex (Capra ibex) adult male chasing two young males away, Gran Paradiso National Park, Italy, July

David Pattyn / Red necked grebe (Podiceps grisegena) approaching a competitor in an attempt to drive him away during the courting season, Danube area, Bulgaria, April

Anup Shah / African elephants (Loxodonta africana) sparring, Masai Mara National Reserve, Kenya, August

Andy Rouse / Agile wallabies (Macropus agilis) sparring and fighting, Bamarru Plains, Northern Territories, Australia

Andy Rouse / Agile wallabies (Macropus agilis) sparring and fighting, Bamarru Plains, Northern Territories, Australia

Charlie Summers / Plains Zebra (Equus quagga) in a dominance fight with dust flying, Lake Magadi, Serengeti, Tanzania.

Carol Walker / Wild horses / Mustangs, two stallions play fighting, Pryor Mountains, Montana, USA, July 2010

George Sanker / Bison (Bison bison) two males head to head, Yellowstone NP, Wyoming, USA

Rolf Nussbaumer / Northern mockingbird (Mimus polyglottos) adult fighting with Golden-fronted Woodpecker (Melanerpes aurifrons) female over Texas Prickly Pear Cactus (Opuntia lindheimeri) Dinero, Lake Corpus Christi, S...

Marie Read / Two Black-capped chickadees (Poecile atricapillus) in mid-air fight by a sunflower, New York, USA, February

Gerrit Vyn / Dall sheep (Ovis dalli) rams head butting, one behaviour by which males establish dominance during the Autumn mating season. Denali National Park, Alaska, USA

Bertie Gregory / 2020VISION / Red deer (Cervus elaphus) stags fighting during rut, Richmond Park, London, England, UK, October. Did you know? Richmond Park deer herds are descended from historic medieval royal hunting stock.

Bertie Gregory / 2020VISION / Red deer (Cervus elaphus) stags fighting during rut, with blocks of flats in the background, Richmond Park, London, England, UK, October

Bertie Gregory / 2020VISION / Red deer (Cervus elaphus) stags fighting during rut, Richmond Park, London, England, UK, October

Markus Varesvuo / Horned / Slavonian grebe (Podiceps auritus) two individuals fighting in water, Finland May

Juan Carlos Munoz / Two White Tailed Sea Eagle (Haliaeetus albicilla) fighting in acrobatic flight as Raven (Corvus corax) looks on. Scandinavia, April. 5th, 2010 Euronatur Wildlife photographer competition.

Juan Carlos Munoz / Two White Tailed Sea Eagle (Haliaeetus albicilla) fighting in acrobatic flight as Raven (Corvus corax) looks on and a Herring Gull (Larus argentus) flies past. Scandinavia, April.

Andy Rouse / Two Common Zebra (Equus quagga) fighting. Masai Mara, Kenya.

Terry Whittaker / 2020VISION / Two Red deer (Cervus elaphus) stags fighting, rutting season, Bushy Park, London, UK, October

Terry Whittaker / 2020VISION / Red deer (Cervus elaphus) stag chasing another during a fight, rutting season, Bushy Park, London, UK, October

Andrew Parkinson / Whooper swan (Cygnus cygnus) adult aggressively chasing another, UK visitor between November and March. Lancashire, UK, October.

Andrew Parkinson / Mute swan (Cygnus olor) adult in threat posture, Derbyshire, UK, February.

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) two stallions fighting, Wicken Fen, Cambridgeshire, UK, June

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) two stallions fighting, Wicken Fen, Cambridgeshire, UK, June

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) herd grazing with two stallions interacting, Wicken Fen, Cambridgeshire, UK, June 2011

Dave Watts / Eastern grey kangaroo (Macropus giganteus) two males boxing, Australian Capital Territory, Australia, December

Ernie Janes / Two male Mute swans (Cygnus olor) displaying on water in territorial dispute, UK

Anup Shah / Adolescent male Lions (Panthera leo) play fighting, Masai Mara National Reserve, Kenya, March

Radomir Jakubowski / Two Muskox (Ovibos moschatus) in landscape, Dovrefjell national park, Norway, September

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) two stallions fighting, wild herd in rewilding project, Wicken Fen, Cambridgeshire, UK, June 2011. Photographer quote: "Koniks are a rare Polish horse used as surrogate gr...

Carol Walker / Wild Horses / mustangs, two stallions rearing up fighting, Pryor Mountains, Montana, USA, June

Charlie Summers / Two Wild Horse Stallions (Equus caballus) fighting in mist. Montana, USA, June.

Andy Rouse / Two male Mountain Gorilla (Gorilla beringei) facing up and chest-beating in a dominance / hierarchy behaviour. Rwanda, Africa

Danny Green / 2020VISION / Red deer (Cervus elaphus) dominant stag at rut, Bradgate Park, Leicestershire, England, UK, November

Danny Green / 2020VISION / Red deer (Cervus elaphus) stag bellowing during autumn rut, Richmond Park, London, England, UK, October

Sergey Gorshkov / Red fox (Vulpes vulpes) one fox chasing another across snow, Kamchatka, Far east Russia, April

Fergus Gill / Red grouse (Lagopus lagopus scoticus), portrait of a cock bird displaying to rival males. Cairngorms National Park, Scotland, April

Anup Shah / Lion cub (Panthera leo) aged about 9 months bullying a younger cub aged about 4 months. Masai Mara National Reserve, Kenya, August 2009

Anup Shah / Two Cape / African Buffalo (Syncerus caffer) males fighting as a test of strength, Masai Mara National Reserve, Kenya. February

Anup Shah / Southern / Masai giraffe (Giraffa camelopardalis tippelskirchi) males dominance mating, Masai Mara National Reserve, Kenya. February

Anup Shah / African Lions (Panthera leo) male and female watching with irritation as a young cub aged 6-9 months approaches, Masai Mara National Reserve, Kenya. December

Anup Shah / Lion cub (Panthera leo), aged 7 months, bullying a younger cub aged 2-3 months. Masai Mara National Reserve, Kenya, September 2009

Anup Shah / Lion cub (Panthera leo) aged 7 months bullying younger cub aged 2-3 months. Masai Mara National Reserve, Kenya, September 2009

Charlie Summers / Two Mustang (Equus caballus) stallions, a strawberry roan on the left and a black on the right, rearing and fighting for dominance, Pryor Mountain Range of Montana, USA

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging, Susa group, Parc National des Volcans, Rwanda Not available for ringtone/wallpaper use.

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging forward, Susa group, Parc National des Volcans, Rwanda, HIGHLY COMMENDED, MAMMAL BEHAVIOUR, 2011 WILDLIFE PHOTOGRAPHER OF THE...

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging, Susa group, Parc National des Volcans, Rwanda

Claudio Contreras / Two Guadalupe fur seals (Arctocephalus townsendi) males fighting for dominance, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico. April

Charlie Summers / Two Giraffes (Giraffa camelopardalis) use their necks in fight for dominance, Etosha Pan, Namibia, Southern Africa

Charlie Summers / African Elephant (Loxodonta africana) bulls in dominance fight, Mono Pools national Park, Zimbabwe, Southern Africa

Kristel Richard / A wild Misaki-uma breeding stallion (right) brings back one of his mares to his band while another breeding stallion (left) charges him away, in the Cape Toi Reserve, Miyazaki Prefecture, Kyushu Islan...

LYNN M. STONE / Trumpeter Swans (Cygnus buccinator) in winter morning mist, showing aggression during courtship behaviour, Mississippi River, Minnesota, USA, February

Igor Shpilenok / Close up of Two Red foxes (Vulpes vulpes) fighting in the snow, Kronotsky Zapovednik, Kamchatka, Russia

Edwin Giesbers / Common european toad {Bufo bufo} two males attempting to mate with one female, the Netherlands

Wild Wonders of Europe / E. Haarberg / Black grouse (Tetrao tertrix) males fighting, expiring warm air on a cold morning, Bergslagen, Sweden, April 2009

Wild Wonders of Europe / Unterthiner / Whooper swan (Cygnus cygnus) pecking at juvenile, Lake Tysslingen, Sweden, March 2009

Carol Walker / Wild Horses / Mustangs, sorrel stallion striking at another stallion, McCullough Peaks Herd Area, Cody, Wyoming, USA

Carol Walker / Wild horses / Mustangs, palomino and red dun stallions rearing, Pryor Mountains, Montana, USA

Carol Walker / Wild horses / Mustangs, palomino and red dun stallions rearing, Pryor Mountains, Montana, USA

Bernard Castelein / Blackbuck (Antilope cervicapra) two males fighting, Rajasthan, India

Eric Baccega / Semi wild Przewalski horses (Equus ferus przewalskii), stallion biting another stallion to chase it from his herd, Parc du Villaret, Causse Mejean, Lozere, France