Andy Murch / Happy Eddy (Haploblepharus edwardsii) amongst Cape sea urchin (Parechinus angulosus) and starfish. False Bay, Western Cape, South Africa. June.

Andy Murch / Cape fur seal (Arctocephalus pusillus) playing with Dark shyshark (Haploblepharus pictus) carcass, seal diving in background. False Bay, South Africa. May.

Andres M. Dominguez / Crested tit (Lophophanes cristatus) Sierra de Grazalema Natural Park. Southern Spain. September.

Karine Aigner / Women and children walking along road carrying fire wood and waving, Democratic Republic of Congo. May 2017.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Juergen Freund / Margit Cianelli wildlife carer with young Lumholtz kangaroos (Dendrolagus lumholtzi), one with a radio collar. The tree kangaroo has a radio collar to allow her to explore her forest surroundings read...

Axel Gomille / Wolf (Canis lupus), in meadow, Saxony-Anhalt, Germany

Klein & Hubert / Harp seal (Pagophilus groenlandicus) pup on ice, Gulf of St. Lawrence, Canada

Klein & Hubert / Harp seal (Pagophilus groenlandicus) pup looking up to see behind it, Gulf of St. Lawrence, Canada

Jeff Foott / Yacare caiman (Caiman yacare) with butterfly on snout, Cuiaba River, Pantanal Matogrossense National Park, Pantanal, Brazil.

Juan Carlos Munoz / Short-beaked common dolphin (Delphinus delphis) at Bray Head, Valentia Island, Ring of Kerry, Iveragh Peninsula, County Kerry, Ireland, Europe. September 2015.

Klein & Hubert / Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.

Klein & Hubert / Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.

Andy Rouse / African Leopard (Panthera pardus) walking. Masai Mara, Kenya. February.

Mark Taylor / Golden Cocker Spaniel dog, Henry, age 3 years, jumping up.

Fiona Rogers / Southern plains grey langur / Hanuman langur (Semnopithecus dussumieri) infant aged a few days being held by its mother . Jodhpur, Rajasthan, India. March.

Wim van den Heever / Julia heleconia (Dryas julia) butterfly on head of Yacare caiman (Caiman yacare) Pantanal, Brazil.

Claudio Contreras / Firewheel (Gaillardia pulchella) flowers at twilight, Laredo Borderlands, Texas, USA. April

Klein & Hubert / African elephant (Loxodonta africana) calf playing, Botswana.

Klein & Hubert / African elephant (Loxodonta africana) calf playing, Botswana.

Doug Perrine / Humpback whale (Megaptera novaeangliae) lone female playing, blowing bubble stream, Kona, Hawaii, USA.

Pascal Pittorino / Horned pansy (Viola cornuta) in botanic garden, Var, France, March.

Anup Shah / Marabou storks (Leptoptilos crumeniferus) feeding on catfish in waterhole, wide angle view. Maasai Mara National Reserve, Kenya.

Solvin Zankl / Sargassum fish (Histrio histrio) in Broad-toothed gulfweed (Sargassum fluitans) Sargassum Community. Sargasso Sea, Bermuda

MYN / Tim Hunt / Composite of Caddisfly (Trichoptera) larva and cases, Worcestershire, England, UK, May.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) walking towards camera, Urbina Bay, Isabela Island, Galapagos.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) feeding, Urbina Bay, Isabela Island, Galapagos.

Dong Lei / Poppy (Meconopsis racemosa) flower in habitat. Serxu, Shiqu county, Sichuan Province, Qinghai-Tibet Plateau, China. August.

Cyril Ruoso / Chimpanzee (Pan troglodytes) close up portrait, Bakoumba sanctuary, Gabon. Non-ex

Pal Hermansen / Yellow-billed oxpecker (Buphagus africanus) on African buffalo (Syncerus caffer), Masai Mara, Kenya

Ole Jorgen Liodden / Erect-crested penguin (Eudyptes sclateri) surfacing near Bounty Island, Sub-Antarctic New Zealand, March. Endangered species.

Ole Jorgen Liodden / Magellanic penguin (Spheniscus magellanicus) profile portrait, Falkland Islands, November.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), feeding and cleaning.

Erlend Haarberg / Norway lemming (Lemmus lemmus) jumping aggressively, during the lemming population explosion, Vauldalen, Norway, May, 2011.

Klein & Hubert / Young Charolais calf running in meadow, France.

Marie Read / Baltimore oriole (Icterus galbula) male singing in spring, perched on Pear blossom (Pyrus sp.) flowers, New York, USA May.

David Tipling / Red campion (Silene dioica) flowering in woodland amongst Bluebells and Greater stitchwort. Thursford Wood, North Norfolk, UK, May.

Gabriel Rojo / Monk parakeet (Myiopsitta monachus) Calden Forest , La Pampa , Argentina

Nick Garbutt / Yacare Caiman (Caiman yacare) gaping to regulate its body temperature, with attendant hoverflies, the Paraguay River, Taiama Reserve, western Pantanal, Brazil, South America.

Dong Lei / Primula (Primula serratifolia) in habitat, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.

Dong Lei / Group of local children smiling, near Lantsang Mekong river, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.

David Pattyn / Great crested grebe (Podiceps cristatus) close-up of an adult with two young chicks. The Netherlands. June 2014

Chris Mattison / Barred tiger salamander (Ambystoma tigrinum mavortium)eating earth worm, captive occurs in South and Central USA.

Pascal Kobeh / Great white shark (Carcharodon carcharias) in open water, Guadalupe island, Mexico. Pacific Ocean.

Ben Cranke / Hyacinth Macaw (Anodorhynchus hyacinthinus) Piaui, Brazil. July.