Mark MacEwen / Broad snouted caiman (Caiman latirostris) baby in mothers mouth being carried from nest, Sante Fe, Argentina, February

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month old in mothers arms, Tangkoko National Park, Sulawesi, Indonesia.

Ann & Steve Toon / Cape fox (Vulpes chama) cub licking its mothers face, Kgalagadi Transfrontier Park, Northern Cape, South Africa

Edwin Giesbers / Young Western lowland gorilla (Gorilla gorilla gorilla) sleeping in mothers arms. Endangered species. Captive; Apenheul zoo; the Netherlands.

Edwin Giesbers / Young Hamadryas baboon (Papio hamadryas) perched on mothers back. Captive. Apenheul zoo; the Netherlands.

Edwin Giesbers / Young Hamadryas baboon (Papio hamadryas) perching on mothers back. Captive. Apenheul zoo; the Netherlands.

Edwin Giesbers / Young Hamadryas baboon (Papio hamadryas) perched on mothers back. Captive. Apenheul zoo; the Netherlands.

Suzi Eszterhas / Mountain gorilla (Gorilla gorilla berengei) infant sitting on mothers head while she feeds on vegetation, Virunga Volcanoes National Park, Rwanda

Thomas Mangelsen / Polar Bear (Ursus maritimus) cub with paw over eyes, nestled in mothers' chest, Wapusk National Park, Manitoba, Canada

ZSSD / African Elephant (Loxodonta africana) calf leaning on its mothers legs, native to Africa

Shin Yoshino / Koala (Phascolarctos cinereus) mothers and babies in tree, Australia

Anup Shah / Female patas monkey {Erythrocebus patas} feeding on acacia ants, Kenya.

TJ Rich / Female Red fox {Vulpes vulpes} with cub, intimate portrait of affection and close bond between mother and young, England, UK, Europe

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month in its mothers arms, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month in its mothers arms, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Western chimpazee (Pan troglodytes verus) infant male 'Flanle' aged 3 years riding on his mothers back - note six digits to right hand which may be a result of inter breeding within such a small commu...

Anup Shah / African Lion (Panthera leo) cub aged 1-2 months lying on its mothers back, Masai Mara National Reserve, Kenya. March

Richard Du Toit / Burchell's Zebra (Equus burchellii) mothers and foals, Kruger National Park, South Africa

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) infant 'Sopo' aged 18 months running to its mother 'Mopambi' in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Decem...

Martin Willis / Eastern Grey Kangaroo (Macropus giganteus) group grazing with two mothers and their joeys, Tasmania, Australia

Inaki Relanzon / Crowned lemur (Eulemur coronatus) baby on mothers back, Ankarana Special Reserve, Ambilobe, North Madagascar, November

Anup Shah / Egyptian goose family (Alopochen aegyptiacus) on lily bed, Masai Mara National Reserve, Kenya

Nick Upton / Aerial view of Grey seal colony (Halichoerus grypus) with pups, resting on a sandbank at Scroby Sands, Great Yarmouth, Norfolk, UK, January.

Nick Upton / New forest pony (Equus caballus) foals resting while their mothers graze. New Forest National Park, Hampshire, UK, June 2010.

Nick Upton / New forest pony (Equus caballus) foals sleeping while their mothers graze grass. New Forest National Park, Hampshire, UK, June 2010.

Thomas Marent / Celebes Black Macaque (Macaca nigra) mothers grooming young, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Alex Mustard / A baby Florida manatee (Trichechus manatus latirostrus) suckling on his mothers milk in the early morning. Three Sisters Spring, Crystal River, Florida, USA. February 2010

Winfried Wisniewski / Spotted Hyena (Crocuta crocuta) mothers with pups, Masai Mara, Kenya

Winfried Wisniewski / Spotted Hyena (Crocuta crocuta) mothers with pups, Masai Mara, Kenya

Mitsuaki Iwago / Orangutan (Pongo pygmaeus) young smelling food in mothers mouth, Borneo, Malaysia

Mitsuaki Iwago / Japanese Macaque (Macaca fuscata) mothers grooming eachother, Jigokudani, Japan

Anup Shah / Olive baboon baby (Papio cynocephalus anubis) aged 9-12 months sitting on his mothers back playing with a stem of grass, Masai Mara National Reserve, Kenya. March.

Tui De Roy / Grevy's Zebra (Equus grevyi) mothers and foals, Mpala Research Centre, Kenya

George Sanker / Female Red fox (Vulpes vulpes) yawning with cub putting its mouth in mothers mouth, Grand Teton National Park, Wyoming, USA, May

Theo Allofs / Celebes Black Macaque (Macaca nigra) mothers with babies, Sulawesi, Indonesia

Fiona Rogers / Verreaux's sifaka (Propithecus verreauxi) portrait of baby on mothers back, Berenty Private Reserve, Madagascar, October

Andy Rouse / African lion (Panthera leo) cub playing with mothers tail, Masai Mara, Kenya, Africa

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) bulls calling surrounded by resting mothers and pups, Donna Nook, Lincolnshire, UK, November 2008

Stephen Belcher / Orangutan (Pongo pygmaeus) baby held in its mothers hands, Tanjung Puting National Park, Borneo, Malaysia, Indonesia

Eric Baccega / Displaced mothers and babies waiting for health care at the dispensary of the refugee camp Mugunga 1, west of Goma, North Kivu, Democratic Republic of Congo, Africa, March 2009

Piper Mackay / Black howler monkey (Alouatta caraya) baby looking out from under mothers arm, eating leaf, Soberania NP, Panama

Andy Rouse / Chimpanzee (Pan troglodytes) young in mothers arms, Mahale NP, Tanzania

Anup Shah / Wild Mandrill (Mandrillus sphinx) horde including two mothers carrying babies, walking along tree branch in gallery forest during dry season. Lope National Park, Gabon. July 2008.

Gertrud & Helmut Denzau / Rhesus macaque (Macaca mulatta) infant licking mothers nipple, Sundarbans Mangrove forest, West Bengal, India

Steven Kazlowski / Polar bear (Ursus maritimus) cub mistakenly bites its mothers mouth, along a barrier island on the Arctic coast, Alaska

Jerry Monkman / Mothers and children enjoying time in the sun near Meadow Pond, Stephenson's Way. Groveland, Massachusetts, USA

Jerry Monkman / Mothers taking their babies for a hike through the forest near Meadow Pond, Stephenson's Way, Groveland, Massachusetts, USA

Michio Hoshino / Sea Otter (Enhydra lutris) mothers and pups resting on rocks, Alaska

Yva Momatiuk & John Eastcott / Guanaco (Lama guanicoe) calves and mothers on grassy slope, Torres del Paine National Park, Chile

Yva Momatiuk & John Eastcott / Guanaco (Lama guanicoe) calves and mothers on grassy slope, Torres del Paine National Park, Chile

Yva Momatiuk & John Eastcott / Guanaco (Lama guanicoe) mothers and calves resting together with one calf nursing, Torres del Paine National Park, Chile

Norbert Wu / Harbor Seal (Phoca vitulina) mothers and pups hauled out on icebergs, LeConte Glacier, southeast Alaska

Jouan & Rius / Eastern grey kangaroo (Macropus giganteus) joey looking out of mothers pouch, Burrum Coast National Park, Queensland, Australia

Jouan & Rius / Eastern grey kangaroo (Macropus giganteus), joey looking out of mothers pouch, Burrum Coast NP, Queensland, Australia

David Tipling / Weddell seal {Leptonychotes weddellii} and pup on ice. Weddell Sea, Antarctica

LYNN M. STONE / Chesapeake Bay Retriever (Canis familiaris) mother dog and puppies in snow, Illinois, USA. Captive

Eric Baccega / Siberian tiger (Panthera tigris altaca) female licking her cub, captive, IUCN red list of endangered species

Eric Baccega / Orang utan (Pongo pygmaeus) female with her baby, captive, IUCN red list of endangered species

John Cancalosi / Muscovy Duck {Cairina moschata} with ducklings, UK

Terry Andrewartha / Polar bear {Ursus maritimus} cubs following mother on ice, Hudson Bay, Canada

Pete Oxford / African Elephants (Loxodonta africana) mother and baby at a waterhole. During the dry season when the elephants have long distances to travel between available food and water the mothers with newborns...

Pete Oxford / African Elephants (Loxodonta africana) mother and baby at a waterhole. During the dry season when the elephants have long distances to travel between available food and water the mothers with newborns...

Jane Burton / Border Collie pup suckling from bottle, to supplement mothers milk

Jane Burton / Border Collie pup from a large litter, being bottle fed to supplement the mothers milk, 19 days old

RHONDA KLEVANSKY / White rhinoceros with young calf (Ceratotherium simum) Umfolosi GR, Kwazulu-Natal, South Africa

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) two mothers hold newborn infants (2-3 weeks old) with sub-adults nearby, endangered, Parc National Des Volcans, Rwanda

Suzi Eszterhas / Hippopotamus (Hippopotamus amphibius) two week old baby resting atop it's mothers back along the river bank, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Yellow Baboon (Papio cynocephalus) mothers with young babies, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Yellow Baboon (Papio cynocephalus) infant climbing on mothers head as she feeds, Masai Mara National Reserve, Kenya

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) young pups playing in wave wash while mothers are away feeding, Seymour Island, Galapagos Islands, Ecuador

Mark Taylor / Wild boar {Sus scrofa} mother with piglets, Europe.

Suzi Eszterhas / Californian Sealion {Zalophus californianus} Mother and pup climbing up cliff to avoid rising surf, San Miguel Island, California, USA Although pups can swim at birth, they lack strength and coordina...

Suzi Eszterhas / Californian Sealion {Zalophus californianus} Mother and pup climbing up cliff to avoid rising surf, San Miguel Island, California, USA Although pups can swim at birth, they lack strength and coordina...

Suzi Eszterhas / California Sealion {Zalophus californianus} Mother and pup resting, San Miguel Island, California, USA. Sitting upright with neck outstretched is a common and comfortable resting position for sea lio...

Jean-Pierre Zwaenepoel / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} two mothers with young of different ages, Thar desert, Rajasthan, India

Suzi Eszterhas / 8-week Cheetah cub {Acinonyx jubatus} playing with mothers tail, Masai Mara, Kenya.

Eric Baccega / Korowai woman carrying her child on her shoulders, Western Papuasia, Indonesia. 1999 / 2000. (West Papua).

Norbert Wu / African Elephant (Loxodonta africana) mothers and calves, Kenya

Tui De Roy / Hooker's Sea Lion (Phocarctos hookeri) pair of three month old pups playing in peat wallow while mothers are away, Enderby Island, Auckland Islands, New Zealand

Mitsuaki Iwago / Long-tailed Macaque (Macaca fascicularis) mothers with young, Bali

Tui De Roy / Galapagos Fur Seal (Arctocephalus galapagoensis) pups playing in tide pool while their mothers are away feeding, Cape Hammond, Fernandina Island, Galapagos Islands, Ecuador

Eric Baccega / Grizzly bear cubs sleeping while mothers keeps guard {Ursus arctos horribilis} Alaska, US

Anup Shah / Lynne Isbell, Primatologist, in the field with Patas monkeys {Erythrocebus

Anup Shah / Patas monkeys {Erythrocebus patas}. Laikipia plateau, Kenya, East Africa.

Pete Oxford / Chacma baboon mothers with babies, Chobe National Park, Botswana, Africa.

Owen Newman / Female Red kangaroo with joey in pouch {Macropus rufus} Sturt NP, New South Wales, Australia

TJ Rich / Red fox mother and cubs {Vulpes vulpes} England, UK, Europe

TJ Rich / Mother Red fox {Vulpes vulpes} suckling cubs at den entrance, England, UK, Europe

TJ Rich / Red fox mother with cub {Vulpes vulpes} sitting by den entrance, England, UK, Europe

Suzi Eszterhas / African Lion (Panthera leo) mothers and cubs on the move, Masai Mara National Reserve, Kenya

John Cancalosi / Common brush tailed possum in pouch (Trichosurus vulpecula) Sucking attached to nipple. captive, Brush-tailed possums carry babies in their womb for just 17 days. When they are born the blind, embryon...