Felis Images / Asiatic lion (Panthera leo persica), female and cubs in morning light, cub biting mother's leg. Gir National Park, Gujarat, India. Photo?hillip Ross/Felis Images

Neil Aldridge / Plain's zebra (Equus quagga) biting the neck of a rival during a fight Hluhluwe imfolozi Park. South Africa.

Igor Shpilenok / Red fox (Vulpes vulpes) cub biting tail of adult male, Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East. June.

Klein & Hubert / Polar bear (Ursus maritimus) play fighting on ice male biting female on the neck, Svalbard, Norway.

Visuals Unlimited / Mosquito (Culex pipiens) female feeding on human blood, while a second mosquito is arriving.

Daniel Heuclin / Armadillo Lizard (Cordylus cataphractus) biting its own tail while trying to roll into a defensive ball, captive, from South Africa

Diane McAllister / Japanese Macaque (Macaca fuscata) biting needles from tree branch while sitting in hot spring in Jigokudani, Japan, January

Denis-Huot,Denis-Huot / Lion(Panthera leo) cub playing with its mothers tail, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Igor Shpilenok,Igor Shpilenok / Large male Reindeer (Rangifer tarandus) standing in shallow waters of the Kronotsky lagoon, away from biting insects. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male trying to break into bamboo to feed on ant eggs from a nest, Tangkoko National Park, Sulawesi, Indonesia.

Erlend Haarberg / Midges (Chironomus islandicus) swarming, Myvatn, Iceland, June

Erlend Haarberg / Midges (Chironomus islandicus) on a 'No Walking' sign, Myvatn, Iceland, May

Roland Seitre / Hermit / Northern bald ibis (Geroniticus eremita) breeding project of the Jerez de la Frontera Zoo, Cadiz, Spain. Keeper with two chicks pecking his face, keepers wear ibis helmets to limit human impr...

Martin Dohrn / African driver / Siafu / Safari ant biting {Dorylus/ Anomma speciess). Species is non-stinging, but jaws can tear human flesh. East Africa

Pedro Narra / Bottlenose dolphins (Tursiops truncatus) leaping in mating rituals, Sado Estuary, Portugal, October

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) mutual grooming, wild herd in rewilding project, Wicken Fen, Cambridgeshire, UK, June 2011

Danny Green / 2020VISION / Grey seals (Halichoerus grypus) two adults fighting in the surf, Donna Nook, Lincolnshire, England, UK, October

Alex Hyde / Cleg fly / Horsefly (Haematopota pluvialis) sucking blood from human.

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Mark Taylor / Playful Border Collie puppies, 6 weeks.

Anup Shah / Nile crocodile (Crocodylus niloticus) attacking a Wildebeest (Connochaetes taurinus) as it crosses the Mara River. Masai Mara National Reserve, Kenya, September 2009

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

Steve Knell / Swarm of Midges (Chironomidae) flying around grass stems. Lake Myvatn, Iceland. June

Steve Knell / Swarm of Midges (Chironomidae) flying around grass stems. Lake Myvatn, Iceland. June

Jeff Rotman / Shark expert Neal Watson fighting off a Lemon shark (Negaprion brevirostris) with a shark club, The Bahamas, Caribbean. (model released) Model released.

Nick Upton / Cleg fly / Horsefly (Haematopa pluvialis) sucking blood from photographer's arm, Wiltshire pastureland, UK, June.

Wild Wonders of Europe / Green / Northern gannets (Morus bassanus) on rock squabbling, Saltee Islands, Ireland, June 2009

Andy Rouse / Polar Bear (Ursus maritimus) mother and cub playing in water, Svalbard, Norway, September 2009

Andy Rouse / Bengal Tiger (Panthera tigris tigris) female fighting with her 18-month cub (females fight when it is time for the cubs to move on and find their own territory) Ranthambore NP, Rajasthan, India. Veoli...

Carol Walker / Wild Horses / Mustangs, two young bachelor stallions playing, McCullough Peaks Herd Area, Cody, Wyoming, USA

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

Laurent Geslin / A swarm of midges (Chironomidae) flying in the morning. Walthamstow reservoir, London, UK

Jane Burton / Dogue de Bordeaux puppy chewing on toy, 15 weeks

Tony Heald / RF- Two Common zebra (Equus quagga) fighting, Etosha national park, Namibia. (This image may be licensed either as rights managed or royalty free.)

Anup Shah / Cheetah cub bites throat of gazelle prey, Masai Mara, Kenya {Acinonyx jubatus}

Anup Shah / Female Cheetah bites throat of gazelle prey, Masai Mara, Kenya {Acinonyx jubatus}

Anup Shah / Lion suffocating zebra prey {Panthera leo} Masai Mara NR, Kenya, East Africa

Asgeir Helgestad / Old Reindeer bull resting in windy place to avoid biting insects {Rangifer tarandus} summer. Buskerud, Norefjell, Norway

Martin Dohrn / Lioness killing Zebra, Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting.

Andrew Parkinson / Grey seal female (left) rejects male's attempt to mate (Halichoerus grypus) Lincolnshire, UK

Ashok Jain / Fishermen wearing masks to protect from tiger attack. Sunderband, W Bengal, India. Tigers attack by biting back of neck, mask with prominent eyes intended to mislead and prevent tiger from attacking f...

Suzi Eszterhas / Leopard (Panthera pardus) five-week-old cub playing with mother's tail, Jao Reserve, Botswana

Suzi Eszterhas / Leopard (Panthera pardus) five-week-old cub playing with mother, Jao Reserve, Botswana

Daniel J. Cox / Gray Wolf (Canis lupus) pair predating female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 1 of 4