Cheryl-Samantha Owen / African elephant (Loxodonta africana) calf covered in mud, Engong Narok swamp, Amboseli National Park, Kenya.

Staffan Widstrand / Hippopotamus (Hippopotamus amphibius) bull emerging from water to charge, iSimangaliso Wetland Park, KwaZulu Natal National Park. South Africa. Specially commended in the Animal Portraits category of...

Ole Jorgen Liodden / Hippopotamus (Hippopotamus amphibius) rearing head out of water, creating spray, Lake Naivasha, Kenya.

Denis-Huot / Black rhinoceros (Diceros bicornis) female and young in the mud, Masai-Mara Game Reserve, Kenya. February.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult female 'Mosoko' aged 8 years and juvenile male 'Mobangi' aged 5 years drinking from a dirty pool of water in Bai Hokou, Dzanga Sangha Specia...

Toby Roxburgh / Cleaning and processing of King scallops (Pecten genus) prior to auction at Brixham Harbour, Devon, England, UK, 2009.

Warwick Sloss / African lion {Panthera leo} male covered in mud and blood after feeding on a hippo kill, Katavi NP, Tanzania.

Andy Rouse / Polar bear (Ursus maritimus) with seal kill, Svalbard, Norway, September 2009

Richard Du Toit / Cheetah {Acinonyx jubatus} covered in blood from prey, Moremi Wildlife Reserve, Botswana

Tony Heald / African elephant {Loxodonta africana} kicking up white mud (Calcrete and water) Etosha national park, Namibia.

Tony Heald / African Elephant spraying muddy water over itself. Botswana Chobe NP, Africa

Tony Heald / Bloody faced African lioness licking lips after feeding, Chobe NP, Botswana

Doug Allan / Emperor penguin {Aptenodytes forsteri} wounded in attack by Leopard seal, Antarctica

David Woodfall / A homeless camp protesting against local authority, Brighton, UK. April 2017.

Carol Walker / Close up of chestnut Spanish mustang with burs in mane and forelock at Black Hills Wild Horse Sanctuary, South Dakota, USA.

Merryn Thomas / Domestic Blue hairless dog at Moche ruins, near Trujillo, Peru.

Andy Rouse / African Elephant (Loxodonta africana) calf in rain, wallowing in mud. Maasai Mara, Kenya, Africa. September.

Wim van den Heever / Blue waxbill (Uraeginthus angolensis) taking a bath, Zimanga Private Game Reserve, South Africa

Cheryl-Samantha Owen / Two juvenile African elephants (Loxodonta africana) playing in mud, Engong Narok swamp, Amboseli National Park, Kenya.

Robin Chittenden / Scientists examining beached Sperm Whale (Physeter macrocephalus) with blood on the beach, Norfolk, UK, February 2016.

Roland Seitre / Javan warty pig (Sus verrucosus) walking through mud, captive, endemic to Indonesia.

Denis-Huot / Male African buffalo (Syncerus caffer) having a mud bath, flinging mud, Meru National Park, Kenya. May.

Tim Laman / Gentoo penguin (Pygoscelis papua) chick calling, filthy from fall in mud. Cuverville Island, Ererra Channel, Gerlache Strait vicinity, Antarctica.

Will Burrard-Lucas / Shoebill (Balaeniceps rex) portrait, Bangweulus Swamps, Zambia.

Pal Hermansen / Blackbird (Turdus merula) killed probably by cat, in snow, Akershus, Norway.

Jeff Vanuga / Chinstrap Penguin (Pygoscelis antarctica) covered in dirt, Anarctica.

MYN / Brett Lewis / Slow worms (Anguis fragilis) in a tangled mass, Richbourough, Kent, UK, June, meetyourneighbours.net project

Staffan Widstrand / Muddy feet of photographer, Staffan Widstrand, Pulicat Lake, Tamil Nadu, India, January 2013.

Denis-Huot / Cheetah (Acinonyx jubatus) close-up of a cheetah with blood on it's face while eating, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Jabruson / Telephone cables and junction box on post, signs of development of third world infrastructure, Sao Tome, Democratic Republic of Sao Tome and Principe, off Gulf of Guinea, Central Africa 2009

Onne van der Wal / Messy ropes aboard a 6 Metre Class yacht, World Championships, Newport, Rhode Island, USA. September 2009.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, blenheim, naughtily looking through rubbish.

Petra Wegner / Cavalier King Charles Spaniel, ruby, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, tricolour, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, ruby, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, tricolour, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, making a mess with rubbish.

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, making a emss with rubbish.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, puppy, 5 months, tricolour, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

David Tipling / 2020VISION / Young boy's legs - running and kicking mud and fallen leaves in woodland, Norfolk, January 2011 Model released

Fergus Gill / Blackbird (Turdus merula) female ruffling feathers on a garden tub. Perthshire, Scotland, June .

Anup Shah / Cape or African Buffalo male (Syncerus caffer) covered in mud - side profile. Masai Mara National Reserve, Kenya, August 2009

Anup Shah / Lion cub (Panthera leo) covered in mud from playing, Masai Mara National Reserve, Kenya. March

Charlie Summers / Chinstrap Penguin (Pygoscelis antarcticus) filthy from sliding down a snowbank that was covered in algae. South Orkney Islands, January

David Kjaer / Blue Tit (Parus caeruleus) in poor condition, exhausted from feeding chicks all season, Worcestershire, England, UK, June.

Warwick Sloss / African lions {Panthera leo} feeding on hippo kill in drying river bed, Katavi NP, Tanzania.

Warwick Sloss / African lion {Panthera leo} snarling female covered in mud and blood feeding on a hippo kill, Katavi NP, Tanzania.

Tony Heald / African elephant {Loxodonta africana} kicking up mud in waterhole, Etosha national park, Namibia.

Tony Heald / Group of African elephants {Loxodonta africana} adult and juveniles playing in mud, Etosha national park, Namibia.

Anup Shah / Spotted hyaena {Crocuta crocuta} defending itself from male lion {Panthera leo} Kenya.

Anup Shah / Spotted hyaena {Crocuta crocuta} bathing in muddy water. Tanzania.

Brent Hedges / Hippopatamus (Hippopotamus amphibius) covered in mud. Masai Mara GR, Kenya, East Africa

Onne van der Wal / Lines wrapped around two stainless steel winches.

Onne van der Wal / The furnace in the foundry at the abandoned whaling station in Grytviken, South Georgia.

David Tipling / Kittiwake (Rissa tridactyla) nesting on the side of a fish and chip shop, Bridlington Harbour, North Yorkshire, UK. June.

Yves Lanceau / Domestic pig (Sus scrofa domestica) crossbreed boar bathing in mud, France.

Yves Lanceau / Domestic pig (Sus scrofa domestica) crossbreed group bathing in mud, France.

Tui De Roy / Western Santa Cruz giant tortoise (Chelonoidis porteri) in muddy water, Las Primicias Ranch, Highlands, Santa Cruz Island, Galapagos, South America.

Rose Summers / Grey seal (Halichoerus grypus) pup learning how to eat fish whilst staying in recently constructed British Divers Marine Life Rescue seal hospital, Cornwall, UK. December 2021.