Steven Kazlowski / Moose (Alces alces) newborn calves playing in spring vegetation. Tony Knowles Coastal Trail, Anchorage, south-central Alaska.

Steven Kazlowski / Moose (Alces alces) newborn calf kneels to feed on vegetation. Kincaid Park, Anchorage, south-central Alaska, May.

George Sanker / Black bear (Ursus americanus) young cub portrait, Yellowstone National Park, Wyoming, USA

Philippe Clement / Canada goose (Branta canadensis) swimming with goslings in lake, Belgium, May

Matthew Maran / Canada goose (Branta canadensis) gosling portrait, Hornsey, London, UK May

Anup Shah / Spotted hyaena (Crocuta crocuta) pup aged 6-9 months portrait, Masai Mara National Reserve, Kenya, August

Anup Shah / Lioness (Panthera leo) playing with young cub aged 3-6 months, Masai Mara National Reserve, Kenya, August

Anup Shah / Olive baboon (Papio cynocephalus anubis) female grooming another females baby, Masai Mara National Reserve, Kenya, August

Anup Shah / Olive baboon (Papio cynocephalus anubis) female with baby aged 1-3 months being groomed, Masai Mara National Reserve, Kenya, September

Anup Shah / Olive baboon (Papio cynocephalus anubis) juvenile cuddling an infant aged 9-12 months, Masai Mara National Reserve, Kenya, August

Anup Shah / Lioness (Panthera leo) playing with a cub aged 9-12 months, Masai Mara National Reserve, Kenya, August

Anup Shah / Olive baboon (Papio cynocephalus anubis) baby aged 3-6 months scratching, Masai Mara National Reserve, Kenya, August

Anup Shah / Lioness (Panthera leo) playing with a cub aged 9-12 months, Masai Mara National Reserve, Kenya, August

Cheryl-Samantha Owen / Black footed penguin (Spheniscus demsersus) chick hatching inside a small incubator at the Southern African Foundation for the Conservation of Coastal Birds (SANCCOB) which collects abandoned eggs fro...

Andy Rouse / European hare (Lepus europaeus) leveret jumping, Essex, UK, June

LYNN M. STONE / Tabby kitten amongst garden flowers Sarasota, Florida, USA

Andy Rouse / 2020VISION / European Hare (Lepus europaeus) leveret feeding on grass. Wales, UK, May.

Andy Sands / Little owl (Athene noctua) two chicks on tree stump, Hertfordshire, England, UK, June

Ernie Janes / Ebdem Geese Goslings at four days

Andy Rouse / Polar bear (Ursus arctos maritimus) mother rolling in snow watched by new year cubs, 6 months old, Svalbard, Arctic

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) babies swaddled up in cloth ready to sleep, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Crate of Spectacled flying fox (Pteropus conspicillatus) babies just arrived by plane from Brisbane after months of care, ready to be returned to the Tolga Bat Hospital for release back to the wild, A...

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) babies swaddled in cloth ready to sleep, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Ernie Janes / Bantam hen (Gallus gallus domesticus) close up sitting on chick, Norfolk, UK, April.

Carol Walker / White horse of the Camargue, foal with its brown baby coat, Camargue, Southern France

Carol Walker / Wild horse / Mustang, foal, portrait, Pryor mountains, Montana, USA

Danny Green / Brown Bear Cub (Ursus arctos) standing behind tree. Finland, Europe, June.

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) female baby 'Putri' aged 2 years riding on her mother's back reaching out with curiosity. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Born...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) male baby 'Thor' aged 8-9 months swinging from a liana. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. July 2010. Rehabili...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) male baby 'Thor' aged 8-9 months hanging from his mother. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. July 2010. Rehabi...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) female baby 'Petra', age 12 months. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. July 2010. Rehabilitated and released (...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) female baby 'Petra' aged 12 months. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. July 2010. Rehabilitated and released (...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) male baby 'Thor', age 8-9 months playing with a leaf. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. July 2010. Rehabilita...

Fiona Rogers / Bornean Orangutan (Pongo pygmaeus wurmbii)female 'Unyuk' and her daughter 'Ursula' aged 4 years. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. June 2010. Rehabilita...

Fiona Rogers / Bornean Orangutan (Pongo pygmaeus wurmbii) age 3-6 months being groomed by it's mother 'Gina'. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. June 2010. Rehabilitate...

Fiona Rogers / Bornean Orangutan (Pongo pygmaeus wurmbii) female 'Unyuk' holding her daughter 'Ursula' age 4. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. June 2010. Rehabilitate...

David Tipling / 2020VISION / Mute swan (Cygnus olor) adult with cygnets on water, Woodwalton Fen, Cambridgeshire, UK, June

Andy Rouse / 2020VISION / Mute Swan (Cygnus olor) with cygnets, Shapwick NNR, Avalon Marshes, Somerset Levels, UK, February

Roland Seitre / Brazilian Tapir (Tapirus terrestris) baby being watched over by its mother. Captive. Medellin Zoo, Antioquia, Colombia.

Roland Seitre / Brazilian Tapir (Tapirus terrestris) baby looking at camera. Captive. Medellin Zoo, Antioquia, Colombia.

Roland Seitre / Brazilian Tapir (Tapirus terrestris) mother with baby. Captive. Medellin Zoo, Antioquia, Colombia.

Roland Seitre / Baby Giant Anteater (Myrmecophaga tridactyla) at two weeks, being fed by its keeper at Beauval Zoo, France. Endemic to South America. 2009.

Ann & Steve Toon / Giraffes (Giraffa camelopardalis), two adults with baby, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January

Ann & Steve Toon / Yellow mongoose (Cynictis penicillata) adult with young, Kgalagadi Transfrontier Park, South Africa, January

George Sanker / Black Bear (Ursus americanus) cub balancing on branch in tree, Yellowstone NP, Wyoming, USA

Petra Wegner / British Longhair Cats / Highlander, Lowlander, Britanica, four kittens in travel cage, 10 weeks

Roland Seitre / Baby Rothschild's Porcupine (Coendou rothschildi) on the palm of conservation volunteer. La Marinas Wildlife Rescue Centre, Costa Rica, 2008.

Roland Seitre / Baby Rothschild's Porcupine (Coendou rothschildi) being bottle-fed. La Marinas Wildlife Rescue Centre, Costa Rica, 2008.

Petra Wegner / Siberian forest cat kitten walking, 7 weeks, white coat

Rolf Nussbaumer / Northern raccoon (Procyon lotor) young at night climbing live Oak tree (Quercus virginiana) Dinero, Lake Corpus Christi, South Texas, USA.

Nick Garbutt / Bornean orang-Utan (Pongo pygmaeus) female with infant,and tourists watching. Camp Leakey, Tanjung Puting NP, Kalimantan, Borneo.

Konrad Wothe / Young Chimpanzee (Pan troglodytes) in tree, Mahale Mountains National Park, Tanzania, East Africa

Dave Watts / Mareeba rock wallaby (Petrogale mareeba) family, near Mareeba, Queensland, Australia, November

Roland Seitre / Hoffmann's Two Toed Sloth (Choloepus hoffmanni) baby wrapped in cloth. Aviarios del Caribe Sloth Refuge, Costa Rica, 2008.

Roland Seitre / Brown-throated Three Toed Sloth (Bradypus variegatus) and Hoffmann's Two Toed Sloths (Choloepus hoffmanni) babies being fed. Aviarios del Caribe Sloth Refuge, Costa Rica, 2008.

Roland Seitre / Brown-throated Three Toed Sloth (Bradypus variegatus) and Hoffmann's Two Toed Sloths (Choloepus hoffmanni) babies held by orphanage owner, Judy Avey-Arroyo. Aviarios del Caribe Sloth Refuge, Costa Ric...

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) female with cub, part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Ben Hall / European rabbits (Oryctolagus cuniculus) juveniles emerging from burrow, Cheshire, UK May

Roland Seitre / Childres with African spurred tortoise (Centrochelys / Geochelone sulcata) Dakar, Senegal, West Africa, Vulnerable species. Three newly hatched babies and one adult over 100 years old

Roland Seitre / Wildlife biologist Valery Kopsco, with a young Black-footed Ferrets (Mustela nigripes), part of a reintroduction project at Bowdoin National Wildlife Refuge, Montana, March 2002.

Ernie Janes / Grey seal (Halichoerus grypus) pup resting on sand dune, Norfolk Beach, UK January

Florian Möllers / Quinling Golden snub nosed Monkey (Rhinopitecus roxellana qinligensis), two females with young grooming. Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China.

Florian Möllers / Quinling Golden snub nosed monkey (Rhinopitecus roxellana qinlingensis), infant peering through leaves. Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China.

Florian Möllers / Quinling Golden snub nosed Monkey (Rhinopitecus roxellana qinlingensis), infant suckling Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China.

Florian Möllers / Quinling Golden snub nosed Monkey (Rhinopitecus roxellana qinlingensis), mother and infant. Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China.

Diane McAllister / White Rhinoceros (Ceratotherium simum) mother and two month baby grazing near Lake Nakuru, Kenya, Africa.

Fabrice Cahez / Red fox (Vulpes vulpes) cubs playing in grass, Vosges, France, April

Fabrice Cahez / Red fox (Vulpes vulpes) three cubs on logs, Vosges, France, May

Ernie Janes / Two large white piglets (Sus scrofa domestica) at 3 weeks in sty, UK

Colin Seddon / Orphaned European river otter (Lutra lutra) cub on towel in care, UK

Dr. Axel Gebauer / Red panda (Ailurus fulgens), cub in breeding den, captive

Dr. Axel Gebauer / Red panda (Ailurus fulgens), two young cubs, captive

Dr. Axel Gebauer / Red panda (Ailurus fulgens), cub 4 days old in breeding den, captive

Roy Mangersnes / Female Polar bear (Ursus maritimus) and cub on coastal rocks near Whale skeleton, Spitsbergen, Svalbard, Norway, August

Edwin Giesbers / Rothschild's giraffe (Giraffa camelopardalis rothschildi) close up of young calf skin pattern, captive

Edwin Giesbers / Reticulated giraffe (Giraffa camelopardalis reticulata) calf standing in front of adult, captive

Gerrit Vyn / Dall sheep (Ovis dalli) yearling lamb running across alpine tundra, Denali National Park, Alaska, USA

Nick Turner / Gloucester old spot piglets (Sus scrofa domestica) suckling at the Cotswold Farm Show, Cirencester, UK, July 2008.

Nick Turner / Gloucester old spot piglets (Sus scrofa domestica) suckling at the Cotswold Farm Show, Cirencester, UK, July 2008.

George Sanker / Newborn Elk (Cervus canadensis) calf looks up to its mother, Yellowstone National Park, USA, June

George Sanker / Coyote (Canis latrans) climbing over rocks carrying pup in mouth, Yellowstone National Park, Wyoming, USA, June

Bernard Castelein / Southern plains grey langur (Semnopithecus entellus / Presbytis entellus) tiny juvenile, Jodhpur, Rajasthan India

Bernard Castelein / Khur / Asiatic wild ass (Equus hemionus) with foal, walking at sunset, Little Rann of Kutch, Gujarat, India

Bernard Castelein / Khur / Asiatic wild ass (Equus hemionus) with foal, Little Rann of Kutch, Gujarat, India

Laurie Campbell / Mute swans (Cygnus olor) newly hatched cygnets on pond, Yetholm Loch Scottish Wildlife Trust Reserve, Roxburghshire, Scotland, May

Konstantin Mikhailov / European wild cat (Felis silvestris) kitten sitting, Bavarian Forest National Park, Germany, May

Inaki Relanzon / Milne-Edwards' sifaka (Propithecus edwardsi) with young on its back, Ranomafana National Park, Madagascar, Endangered, September

Laurie Campbell / Slow worm (Anguis fragilis) female with newborn young on rock face, controlled conditions, Berwickshire, Scotland, July

Laurie Campbell / Juvenile European rabbit (Oryctolagus cuniculus) in public park, Edinburgh, Scotland, June

Laurie Campbell / Golden eagle (Aquila chrysaetos) chick, one week, in eyrie showing egg-tooth on tip of bill, Argyll, Scotland, early May

Andrew Parkinson / 2020VISION / A line of Mallard (Anas platyrhynchos) ducklings swimming on a still lake, Derbyshire, England, UK, June. Did you know? A Mallard duck will lay more than half her body weight in eggs.

Andrew Parkinson / 2020VISION / A Mallard (Anas platyrhynchos) duckling scurries across the surface of a lake, Derbyshire, England, UK, June

Petra Wegner / Cavalier King Charles Spaniel, puppy, black-and-tan, 6 weeks, sitting on grass, wearing collar.

Petra Wegner / Chihuahuas, longhaired, two puppies, 9 weeks, sitting in a straw basket

Petra Wegner / Siberian Husky, puppy, 11 weeks, lying down.

Petra Wegner / British Shorthair cat, tomcat, lilac, 6 months, standing.