Erlend Haarberg / Mountain hares (Lepus timidus) fighting in snow at night, Vauldalen, Norway. Joint overall winner of the GDT European Wildlife Photographer of the Year 2017. Highly commended in the Wildlife Photo...

Chris & Monique Fallows / Impala (Aepyceros melampus) herd at dawn, Mana Pools National Park, Zimbabwe, October.

Wim van den Heever / Plains zebra (Equus quagga) at sunset, Savuti Marsh, Botswana.

Wim van den Heever / Plains zebra (Equus quagga) at sunset, Savuti Marsh, Botswana.

Wim van den Heever / Plains zebra (Equus quagga) at sunset, Savuti Marsh, Botswana.

Andy Rouse / Sunrise in forest, silhouetting trees. Ranthambhore Tiger Reserve, India.

Ole Jorgen Liodden / Barn swallow (Hirundo rustica) in mud collecting nesting material, collecting nesting material, with golden bokeh affect in puddle, Svalbard, Norway, June.

Nick Garbutt / Infant Golden-crowned Sifaka (Propithecus tattersalli) on its mother's back. Forests adjacent to the village of Andranotsimaty, near Daraina, northern Madagascar. Critically endangered species.

Chris Mattison / Yellow poison dart frog (Phyllobates terribilis) the world's most poisonous amphibian captive from northern South America.

Thomas Marent / Golden Snub-nosed Monkey (Rhinopithecus roxellana) young, Qinling Mountains, Shaanxi, China

Petra Wegner / Guinea Pig (Cavia porcellus) golden long haired, in wooden feeding rack, on garden lawn, feeding on grass

Jane Burton / Golden Retriever, Jez, carrying toys in a basket, with a baby girl aged 6 months riding on his back. Model released

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) the most poisonous of the dart frogs, male carrying tadpoles on his back, Colombia

Pete Oxford / Male Golden mantle saddleback tamarin with young. Yasuni NP {Saguinus tripartitus} Ecuador

Mike Read / Mute swan (Cygnus olor), group at sunrise. King's Sedgemoor Drain at sunrise near Greylake, Somerset Levels, England, UK, October 2018

Lucas Bustamante / Golden-mantled tamarin (Saguinus tripartitus) Yasuni National Park, Orellana, Ecuador

Andy Rouse / Cuckoo (Cuculus canorus) flying at sunset with sunlight behind wings. Wales, UK. May.

Jack Dykinga / Sandhill cranes (Antigone canadensis) landing at sunset backlit in golden light., Bosque del Apache National Wildlife Refuge, New Mexico.

Marie Read / Golden-fronted woodpecker (Melanerpes aurifrons), male, Cozad Ranch, Rio Grande Valley, Texas, USA, March.

Will Watson / Snow on Black Hill / Cat's Back and the Black Mountains with exposed Old Red Sandstone from the Senni Formation, Devonian Period. Golden Valley, Herefordshire, England, UK. March, 2018.

Staffan Widstrand / Wild Wonders of China / Sunset view from the hill behind the Louguantai temple, Xian, Shaanxi, China.

Felis Images / Common goldenback / Common flameback (Dinopium javanese) perched on branch, Kerala, India.

Lucas Bustamante / Golden-mantled tamarin (Saguinus tripartitus) sitting on branch, Yasuni National Park, Orellana, Ecuador.

Jack Dykinga / Sandhill cranes (Grus canadensis) landing at sunset, backlit in golden light., Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Golden' aged 15 years carrying her infant daughter 'Glamour' aged 21 months on her back . Gombe National Park, Tanzania.

Phil Savoie / English oak tree (Quercus robur) at sunset, Monmouthshire Wales UK, March.

Phil Savoie / English oak tree (Quercus robur) at sunset, Monmouthshire Wales UK, March.

Phil Savoie / English oak tree (Quercus robur) at sunset, Monmouthshire Wales UK, March.

Nick Upton / Male Yellow dung flies (Scathophaga stercoraria) coming and going from sheep dung, with one male guarding a female by riding on her back, Wiltshire, England, UK, March.

Nick Upton / Male Yellow dung flies (Scathophaga stercoraria) coming and going from sheep dung, with one male guarding a female by riding on her back, Wiltshire, England, UK, March.

SCOTLAND: The Big Picture / Hoisting Golden Eagle chick back up to nest in pine tree after it has been ringed and monitored for research project, Scotland, UK. June 2016.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) at dawn with breath backlit, Svalbard, Norway, March. Highly commended in the Mammals category of the GDT Awards Competition 2016.

Graham Eaton / Little Grebe (Tachybaptus ruficollis) silhouetted on golden water at sunset. Gwynedd, Wales. December.

Richard Du Toit / Oryx (Oryx gazella) pair running, Kgalagadi Transfrontier Park, South Africa

Richard Du Toit / Oryx (Oryx gazella) pair, Kgalagadi Transfrontier Park, South Africa

Richard Du Toit / Ostrich (Struthio camelus) male, Rietvlei Nature Reserve, South Africa

Edwin Giesbers / Golden lion tamarin (Leontopithecus rosalia) mother with baby on back. Captive, occurs in the Atlantic Rainforest of Brazil. Critically endangered.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) adolescent female 'Golden' aged 13 years lying on her back with her baby daughter aged 1 month on her chest. Gombe National Park, Tanzania.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) adolescent female 'Golden' aged 13 years lying on her back with her baby daughter aged 1 month on her chest. Gombe National Park, Tanzania.

Fabrice Cahez / White willow (Salix alba) catkin, Vosges, France, April.

Mark Bowler / Golden-mantled tamarin (Saguinus tripartitus) captive.

Andy Rouse / Mute swan (Cygnus olor) at sunrise, Wales, UK, April.

Andy Rouse / Chital deer (Axis axis) silhouetted in forest at sunrise, Ranthambhore, India

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) flying towards Polar bear (Ursus maritimus) resting on rocks with golden light from the midnight sun, Svalbard, Norway. August.

Ole Jorgen Liodden / Barn swallow (Hirundo rustica) in mud collecting nest building materials, with wings outstretched backlit, Svalbard, Norway, June.

Paul Hobson / Purple shot copper butterfly,(Lycaena thetis) male at rest, Bulgaria.

Ernie Janes / Bar-tailed godwit (Limosa lapponica) silhouetted at sunset on coastal mudflats, Norfolk, England, UK, February.

Fiona Rogers / Stulmann's blue monkey (Cercopithecus mitis stuhlmanni) female peeling back the lichen on a tree trunk looking for ants. Kakamega Forest South, Western Province, Kenya.

Sandesh Kadur / Juvenile Golden langur (Trachypithecus geei) jumping onto the back of an adult, before both leave the frame, Manas National Park, Kokrajhar, Assam, India

Tui De Roy / Australian Brush-tailed Possum (Trichosurus vulpecula) invasive species, adult with young perched on back. Golden Bay, South Island, New Zealand.

Roland Seitre / White-throated guenon (Cercopithecus mitis albogularis) rear view, Diani Beach, Mombasa, Kenya.

Hanne & Jens Eriksen / Arabian golden winged grosbeak (Rhynchostruthus percivali) Oman, May

Tui De Roy / Spotted Shag (Stictocarbo punctatus) pair in full breeding colours on cliff face nest. Tata Islands, Golden Bay, South Island, New Zealand.

Tim Laman / Golden-mantled Tamarin (Saguinus tripartitus) at the Tiputini Biodiversity Station, Orellana Province, Ecuador, July.

Tim Laman / Golden-mantled Tamarin (Saguinus tripartitus) feeding on a flower at the Tiputini Biodiversity Station, Orellana Province, Ecuador, July.

Thomas Marent / Golden Snub-nosed Monkey (Rhinopithecus roxellana) mother grooming young, Qinling Mountains, Shaanxi, China

Cyril Ruoso / Golden Snub-nosed Monkey (Rhinopithecus roxellana) young playing, Qinling Mountains, China

Cyril Ruoso / Golden Snub-nosed Monkey (Rhinopithecus roxellana) females, Qinling Mountains, China

Cyril Ruoso / Golden Snub-nosed Monkey (Rhinopithecus roxellana) female, Qinling Mountains, China

Mark Taylor / Netherland cross rabbit, Peter, looking over the back of Golden Retriever dog puppy, Oscar, 3 months.

Petra Wegner / British Shorthair Cat, kitten sitting looking back over shoulder, black-golden-classic, 10 weeks

Florian Möllers / Quinling Golden snub nosed Monkey (Rhinopitecus roxellana qinlingensis), golden fur on the back of an adult male. Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China.

Florian Möllers / Quinling Golden snub nosed monkey (Rhinopitecus roxellana qinlingensis), close up of hands of adult female clinging to the fur on the back of an adult male whilst hugging each other. Zhouzhi Nature Re...

Florian Möllers / Quinling Golden snub nosed monkey (Rhinopitecus roxellana qinlingensis), adult male staring back at Chinese biologist. Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China 2006

Inaki Relanzon / Tattersalli / Golden crowned sifaka (Propithecus tattersalli) with baby clinging to back in tree, Daraina, Madagascar, Endangered, November 2011

Jane Burton / Red kitten climbing on the back of a Golden Cocker Spaniel puppy.

Florian Möllers / Golden snub-nosed monkey (Rhinopithecus roxellana qinlingensis) infant peering from behind adult male's back, Zhouzhi Nature Reserve, Qinling mountains, Shaanxi, China, April 2006

Florian Möllers / Golden snub-nosed monkey (Rhinopithecus roxellana qinlingensis), long golden fur on the back of adult male, Zhouzi Nature Reserve, Qinling mountains, Shaanxi, China. April 2006.

Aflo / ic-06001 Golden hamster standing on back legs portrait.

Hiroya Minakuchi / Papuan Jellyfish (Mastigias papua), Palau

Hiroya Minakuchi / Papuan Jellyfish (Mastigias papua), Palau

Sebastian Kennerknecht / Golden Eagle (Aquila chrysaetos) portrait, San Francisco, California

Roy Mangersnes / Young wild Golden Eagle (Aquila chrysaetos) with raindrops on its back, Norway. February

Andy Reisinger / Sand patterns and seastacks, Golden Bay, New Zealand

Steve Knell / Golden ringed dragonfly (Cordulegaster boltonii) with water drops on back. Scotland, UK 2006

Nick Gordon / Silky / Golden white tassel ear Marmoset (Callitrix humeralifer chysoleuca) / {Mico chrysoleuca} adult carrying baby on back, Amazonia, Brazil

Nick Gordon / Silky / Golden white tassel ear Marmoset (Callitrix humeralifer chysoleuca) / {Mico chrysoleuca} adult carrying baby on back, Amazonia, Brazil

Nick Gordon / Silky / Golden white tassel ear Marmoset (Callitrix humeralifer chysoleuca) / {Mico chrysoleuca} adult carrying baby on back, Amazonia, Brazil

Jane Burton / Golden Retriever rolling on its back.

Petra Wegner / Domestic dog, Golden Retriever's back paws

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) mother with young clinging to back, critically endangered, Daraina, northeast Madagascar

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) mother with baby clinging to its back, critically endangered, Daraina, northeast Madagascar

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) mother with young clinging to back, critically endangered, Daraina, northeast Madagascar

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) mother with baby clinging to back, critically endangered, Daraina, northeast Madagascar

Pete Oxford / Golden Crowned Sifaka (Propithecus tattersalli) in tree with young on back, Madagascar

Pete Oxford / Golden mantled saddleback tamarin {Sanguinius tripartitus} Yasuni NP, Amazonia, Ecuador

Heidi & Hans-Juergen Koch / Golden Hamster (Mesocricetus auratus) mother carrying young back to the nest

S. Zankl / Golden lion tamarin carrying young on back {Liontideus rosalia} Silva Jardim, Brazil

Chris Newbert / Papuan Jellyfish (Mastigias papua) 20 feet deep, Solomon Islands

Chris Newbert / Papuan Jellyfish (Mastigias papua) 20 feet deep, Solomon Islands

Pete Oxford / Golden mantle saddleback tamarin (Saguinus tripartitus). Yasuni NP, Ecuador, South America