Ismaele Tortella / Northern gannet (Morus bassanus) colony, chick climbing back into nest, with the midnight sun, Norway, July

Ismaele Tortella / Tracking shot of a Whooper swan (Cygnus cygnus) family walking, Lofoten, northern Norway, August.

Morley Read / Slow motion clip of a Mute swan (Cygnus olor) with three cygnets, Cornwall, England, UK, May.

Andy Rouse / African lion (Panthera leo) female carrying young cub, Masai Mara, Kenya, Africa. Highly commended in the African Wildlife Category of the Nature's Best Photography Competition 2019.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) two adults brooding chicks age 5 weeks, Antarctica. Highly commended in the Polar Passion Category of the Nature's Best Photography Awards 2019.

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 18 days development, the tadpoles are fully developed and ready to hatch, Ecuador. Endangered.

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered.

Chase Dekker / Humpback Whale (Megaptera novaeangliae) calf breaching, Monterey Bay, California

Chase Dekker / Humpback Whale (Megaptera novaeangliae) calf breaching, Monterey Bay, California

Chase Dekker / Humpback Whale (Megaptera novaeangliae) calf breaching, Monterey Bay, California

Chase Dekker / African Lion (Panthera leo) cub, Masai Mara, Kenya

Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry playing in tree, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Gerry Ellis / Chimpanzee (Pan troglodytes) orphans, Larry investigating Daphne's tongue, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry playing in forest nursery, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry scratching, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Jami Tarris / Golden Eagle (Aquila chrysaetos) huntress, Altai Mountains, Bayan Ulgii, Mongolia

Juergen & Christine Sohns / African Lion (Panthera leo) six week old cub, Tswalu Game Reserve, South Africa

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) four year old infant male, named Gizmo, foraging for insects in log, Gombe National Park, Tanzania

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) four year old infant male, named Gizmo, Gombe National Park, Tanzania

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) four year old infant male, named Gizmo, Gombe National Park, Tanzania

Martin Willis / Budgerigar (Melopsittacus undulatus) father with begging chick at nest cavity, Queensland, Australia

Danny Green / Polar bear (Ursus maritimus) female resting with cubs on glacier. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and two cubs feeding on Whale carcass. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs, standing on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs resting on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass, on iceberg. Svalbard, Norway, July 2018.

Danny Green / RF - Polar bear (Ursus maritimus) cub walking in snow. Svalbard, Norway, April. (This image may be licensed either as rights managed or royalty free.)

Danny Green / Ringed seal (Pusa hispida) and pup resting on ice. Svalbard, Norway. April.

Danny Green / Polar bear (Ursus maritimus) female and cubs play fighting. Svalbard, Norway, March 2018.

Danny Green / Polar bear (Ursus maritimus) group on ice, female and cubs feeding on Whale carcass. Svalbard, Norway, June 2018.

Danny Green / Polar bear (Ursus maritimus), two cubs playing, leaping across sea ice, reflected in water. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus), two cubs walking on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) cub ready to jump down from pack ice. Svalbard, Norway, April.

Nick Garbutt / Sumatran pit viper (Trimeresurus sumatranus) juvenile on tree trunk, in tropical rainforest. Danum Valley, Sabah, Borneo, Malaysia.

Nick Garbutt / Puma (Puma concolor puma) young male standing with mouth open. Estancia Amarga, near Torres del Paine National Park, Patagonia, Chile. December.

Gabriel Rojo / Guanaco (Lama guanicoe) female and newborn baby, nose to nose in grassland. La Pampa Province, Argentina.

Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.

Alex Mustard / Green turtle (Chelonia mydas) resting on sea floor and two juvenile Golden trevally (Gnathanodon speciosus). Marsa El Shouna, Marsa Alam, Egypt.

Oscar Dewhurst / Mute swan (Cygnus olor), two cygnets sheltering under parent's wing. Richmond Park, London, England, UK. April.

Oscar Dewhurst / Mute swan (Cygnus olor) swimming with cygnets in misty lake in morning light. Richmond Park, London, England, UK. May.

Claudio Contreras / California condor (Gymnogyps californianus), two perched in tree, adult and juvenile. California condor recovery program, Sierra de San Pedro Martir National Park, Baja California Peninsula, Mexico.

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

David Tipling / Grey seal (Halichoerus grypus) pup, Horsey, Norfolk, England, UK, February.

Tony Wu / Humpback whale (Megaptera novaeangliae australis) female with suckling calf. Vava'u Islands, Tonga.

Tony Wu / Humpback whale (Megaptera novaeangliae australis) male calf playing at ocean surface after coming up to breathe. Vava'u Islands, Tonga.

Doug Gimesy / Senior Forest and Wildlife Officer Abby makes final arrangements to drive to Heaslville Sanctuary from East Sale RAAF Base, with a young rescued burn victim Koala (Phascolarctos cinereus) named '...

Doug Gimesy / After a flight from Mallacoota and just landing at East Sale RAAF base, a young Koala (Phascolarctos cinereus) named 'Micky' - one of 6 being evacuated from the Mallacoota wildlife triage centre to M...

Doug Gimesy / Triage coordinator and Senior Forest and Wildlife Officer Abby Smith - sitting in a Royal Australian Airforce (RAAF) C-27J Spartan - holding a young koala (Phascolarctos cinereus) that was burnt in th...

David Gallan / Eastern grey kangaroos (Macropus giganteus) drinking from bird bath as a bushfire burns in the surrounding forest. Sky reddened by ash and smoke. Tathra, New South Wales, Australia. January 2020.

David Gallan / Desperately thirsty eastern grey kangaroos (Macropus giganteus) drink from a bird bath following a bushfire in Tathra, New South Wales, Australia. Water holes had dried up due to drought and food was...

Doug Gimesy / Platypus researcher holding a young female platypus (Ornithorhynchus anatinus) just before releasing it back into a stream. Healsville, Victoria, Australia. September, 2018.Model released

Doug Gimesy / Young Platypus (Ornithorhynchus anatinus) just released onto a log in McMahons Creek, Yarra Ranges, Victoria, Australia. Photographed under controlled conditions. September 2017.

Doug Gimesy / Young Platypus (Ornithorhynchus anatinus) released onto a log in McMahons Creek, Yarra Ranges, Victoria, Australia. Controlled conditions . September.

Doug Gimesy / Two researchers examine and take measurements from a young female platypus (Ornithorhynchus anatinus) Dalgety, NSW, Australia. September, 2017.Model released.

Doug Gimesy / Platypus researcher holding a young female Platypus (Ornithorhynchus anatinus) just before releasing it back into a stream. Warburton, Victoria, Australia. October, 2018. Model release supplied.

Eric Baccega / Young Eastern White-bearded Wildebeest suckling mother (Connochaetes taurinus) Masai Mara National Reserve, Kenya.

Eric Baccega / Lion male (Panthera leo) carrying carcass of a dead wildebeest calf (Connochaetes taurinus). Masai Mara National Reserve, Kenya.

Eric Baccega / Lion male (Panthera leo) carrying carcass of a dead wildebeest calf (Connochaetes taurinus). Masai Mara National Reserve, Kenya.

Eric Baccega / Two young male lions (Panthera leo) suffocating and killing Wildebeest (Connochaetes taurinus) prey. Masai Mara National Reserve, Kenya.

Eric Baccega / Lioness (Panthera leo) killing in ambush a young eastern White-bearded Wildebeest (Connochaetes taurinus) Masai Mara National Reserve, Kenya.

Eric Baccega / Spotted hyena (Crocuta crocuta) killing a young Eastern White-bearded Wildebeest (Connochaetes taurinus) Masai Mara National Reserve, Kenya.

Morley Read / Brown-banded water snake (Helicops angulatus) swallowing a Basin treefrog (Boana lanciformis) in a pool full of tadpoles in rainforest, Orellana Province, Ecuador.

Morley Read / Close-up of Leaf frog (Cruziohyla craspedopus) tadpoles developing within an egg membrane, blood is circulating in the gills. Pastaza Province, Ecuador.

Morley Read / Close-up of Leaf frog (Cruziohyla craspedopus) tadpoles developing within an egg membrane, blood is circulating in the gills. Pastaza Province, Ecuador.

Morley Read / Map treefrog (Boana geographica) tadpoles gathered at the edge of a puddle, Pastaza Province, Ecuadorian Amazon.

Morley Read / Glass frog (Centrolenidae) tadpoles developing in an egg mass, Cordillera del Condor, Zamora Chinchipe Province, Ecuador.

Morley Read / Glass frog (Centrolenidae) tadpoles developing in an egg mass, Cordillera del Condor, Zamora Chinchipe Province, Ecuador.

Morley Read / Glass frog (Centrolenidae) tadpoles developing in an egg mass, Cordillera del Condor, Zamora Chinchipe Province, Ecuador.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Shwali' aged 17 months portrait . Gombe National Park, Tanzania. May 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 4 years portrait . Gombe National Park, Tanzania. May 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Google' aged 5 years approaching with curiosity . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant make 'Google' aged 5 years being groomed . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Google' aged 5 years sleeping . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) male 'Faustino' aged 25 years watched by infant male 'Google' aged 5 years . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Glitter' aged 16 years playing with her infant daughter 'Gossamer' aged 2 years . Gombe National Park, Tanzania. September...

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Golden' aged 16 years carrying her infant daughter 'Glamour' aged 3 years . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Schweini' aged 23 years carrying her infant son 'Shwali' aged 20 months on her back . Gombe National Park, Tanzania. Septem...

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Dilly' aged 27 years carrying infant son 'Duke' aged 3 years on her back . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Fifty' aged 4 years walking along a trail . Gombe National Park, Tanzania. September 2014.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Golden' aged 16 years carrying her infant daughter 'Glamour' aged 3 years . Gombe National Park, Tanzania. September 2014.

Anup Shah / Olive baboon (Papio anubis) young male being groomed on the shores of Lake Tanganyika. Gombe National Park, Tanzania.

Anup Shah / Olive baboon (Papio anubis) young male being groomed on the shores of Lake Tanganyika. Gombe National Park, Tanzania.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) male 'Sampson' aged 18 years watched by infant male 'Gizmo' aged 4 years . Gombe National Park, Tanzania. May 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 4 years portrait . Gombe National Park, Tanzania. May 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male Gizmo aged 4 years portrait . Gombe National Park, Tanzania. May 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Ipo' aged 5 years feeding on charcoal from a fire . Gombe National Park, Tanzania. September 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) baby aged 3 weeks belonging to 'Fanni' aged 33 years . Gombe National Park, Tanzania. September 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) baby aged 3 weeks hand and foot close-up . Gombe National Park, Tanzania. September 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 5 years close-up of hand holding his mother . Gombe National Park, Tanzania. September 2014.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant female 'Gossamer' aged 2 years portrait . Gombe National Park, Tanzania. May 2014.

Anup Shah / Olive baboon (Papio anubis) young male and female resting on the shores of Lake Tanganyika. Gombe National Park, Tanzania.

Anup Shah / Olive baboon (Papio anubis) young male and female resting on the shores, Lake Tanganyika. Gombe National Park, Tanzania.

Anup Shah / Olive baboon (Papio anubis) juvenile digging for roots. Gombe National Park, Tanzania.