Juergen & Christine Sohns / Meerkat (Suricata suricatta) pair on alert, Tswalu Game Reserve, South Africa

Pete Oxford / Pacific Horned Frog (Ceratophrys stolzmanni), native to South America

Mark Raycroft / Shetland Sheepdog (Canis familiaris)

Luciano Candisani / Jacare Caiman (Caiman yacare) waiting for fish to swim through open mouth in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) waiting for fish to swim through open mouth in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare)fishing in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) fishing in flooded plain, Pantanal, Brazil

Vincent Grafhorst / Hippopotamus (Hippopotamus amphibius) bull, Khwai River, Botswana

Cyril Ruoso / Bonobo (Pan paniscus) smiling while laying on ground, ABC Sanctuary, Democratic Republic of the Congo

Juergen Freund / Mareeba rock-wallaby (Petrogale mareeba) Queensland, Australia

Piotr Naskrecki / Turnip-tailed Gecko (Thecadactylus rapicauda), Suriname

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) swimming, Rio Negro, Amazonia, Brazil

Ingo Arndt / Researcher Jim Lewis curator of the true bug collection at INBio, San Jose, Costa Rica

Mark Raycroft / Rottweiler (Canis familiaris) male and puppy

Mark Raycroft / Australian Kelpie (Canis familiaris) laying in grass

Mark Raycroft / Australian Cattle Dog (Canis familiaris) portrait

Mark Raycroft / Golden Retriever (Canis familiaris) portrait of a puppy sitting among firewood logs

Mark Raycroft / Golden Retriever (Canis familiaris) relaxing on lawn with a young girl

Mark Raycroft / Golden Retriever (Canis familiaris) puppies together with front paws up on a log

Mark Raycroft / Golden Retriever (Canis familiaris) portrait of a puppy sitting on a rock in garden

Pete Oxford / Marsupial Frog (Gastrotheca orophylax) in cloud the forest, Ecuador

Mitsuaki Iwago / Harp Seal (Phoca groenlandicus) resting on snow, Gulf of St Lawrence, Canada

Flip de Nooyer / Common Vole (Microtus arvalis) adult peering from burrow, Europe

Mitsuaki Iwago / African Lion (Panthera leo) three month old cub sleeping on mother's leg, Ngorongoro Conservation Area, Tanzania

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) pod, Hawaii

Konrad Wothe / Fisher (Martes pennanti) baby calling from tree cavity, North America

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) checking out tourist, Mosquera Island, Galapagos Islands, Ecuador

Mitsuaki Iwago / Harp Seal (Phoca groenlandicus) pup portrait, Gulf of St Lawrence, Canada

Mitsuaki Iwago / Freshwater Crocodile (Crocodylus johnstoni) with an open mouth, Australia

Michio Hoshino / Harp Seal (Phoca groenlandicus) pup, Gulf of St Lawrence, Canada

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) playing in shallow water, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) portrait, Waikoloa Hyatt, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) interacting with a female tourist, Dolphin Quest Learning Center, Hawaii

Mark Raycroft / Labradoodle (Canis familiaris), North America

Suzi Eszterhas / Pale-throated Three-toed Sloth (Bradypus tridactylus) male in tree, Sloth Island, Guyana

Ashley Cooper / Villagers in a remote subsistence farming village on an island in the Sunderbans, the Ganges Delta in Eastern India. December 2013.

Ashley Cooper / Climber i on Sgurr Alasdair on the Cuillin Ridge, Isle of Skye, Scotland. March 2006

Ashley Cooper / Dalit woman / untouchable woman in her hut, illuminated by an electric light, powered by an A4 sized solar panel, that charges a battery, and enables her to have light. Karnataka, India. December 2013

Ashley Cooper / King penguins (Aptenodytes patagonicus), with passengers from an expedition cruise. Salisbury Plain, South Georgia Islands.

Ashley Cooper / King penguin (Aptenodytes patagonicus) , with passenger from an expedition cruise, Salisbury Plain, South Georgia, Antarctica, February 2014.

Ashley Cooper / Woman cooking on a traditional clay oven, fuelled by biofuel (rice stalks) Sunderbans, Ganges Delta, Eastern India. December 2013.

Ashley Cooper / Woman cooking on a traditional clay oven, fuelled by biofuel (rice stalks) Sunderbans, Ganges Delta, Eastern India. December 2013.

Ashley Cooper / Village woman putting rice crop into container in a remote subsistence farming village on an island in the Sunderbans, the Ganges Delta, Eastern India. December 2013.

Andrew Peacock / Sea Otter (Enhydra lutris), Inian Islands, Icy Strait, Alaska

Mark Raycroft / Pembroke Welsh Corgi (Canis familiaris), North America

Mark Raycroft / Pembroke Welsh Corgi (Canis familiaris), North America

Mark Raycroft / Chesapeake Bay Retriever (Canis familiaris) puppy, North America

Suzi Eszterhas / Mule Deer (Odocoileus hemionus) conservationist, Diane Nicholas, bottle feeding three day old orphaned fawns, Kindred Spirits Fawn Rescue, Loomis, California

Heidi & Hans-Juergen Koch / Tarantula (Theraphosidae) on circus performer's face, Germany

Agustin Esmoris / Moai statue, Rano Raraku, Easter Island, Chile

Gary K. Smith / Cucumbers, 'Louisa' F1, Tomatoes (Solanum lycopersicum) including 'Suncherry Smile', 'Green Tiger', 'Blush Tiger', 'Pink Tiger' and pots of sweet basil.

Gary K. Smith / Tomatoes (Solanum lycopersicum) 'Suncherry Smile', and 'Blush Tiger'.

Thomas Marent / Jacare Caiman (Caiman yacare) thermoregulating, Pantanal, Mato Grosso, Brazil

Thomas Marent / Jacare Caiman (Caiman yacare) thermoregulating, Pantanal, Mato Grosso, Brazil

Thomas Marent / Spectacled Caiman (Caiman crocodilus) young, Leticia, Colombia

Suzi Eszterhas / Giant Panda (Ailuropoda melanoleuca) feeding on bamboo, Shenshuping Panda Base, Wolong Nature Reserve, Sichuan, China

Katherine Feng / Lesser Panda (Ailurus fulgens), Wolong Nature Reserve, Sichuan, China

Suzi Eszterhas / Photographer Suzi Eszterhas

Suzi Eszterhas / Photographer Suzi Eszterhas

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) young female, one year old, Gombe National Park, Tanzania

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) male, thirty-six years old, Gombe National Park, Tanzania

Suzi Eszterhas / Cotton-top Tamarin (Saguinus oedipus) conservationist making eco-mochil bag, traditional style bags made out of littered plastic bags, which are then sold to tourists to raise money for tamarin conser...

Mark Carwardine / New Zealand Kaka (Nestor meridionalis) investigating camera with Mark Carwardine, South Island, New Zealand

Pete Oxford / Alpaca (Lama pacos) pair and photographer Pete Oxford, Antisana Ecological Reserve, Ecuador

Mark Raycroft / Black Labrador Retriever (Canis familiaris)

Mark Raycroft / Chihuahua (Canis familiaris)

Mark Raycroft / Chihuahua (Canis familiaris)

Mark Raycroft / Grizzly Bear (Ursus arctos horribilis), North America

ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) calf playing with mother underwater, San Diego Zoo, California

ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) 5 month old calf playing underwater, San Diego Zoo, California

ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) 5 month old calf with mother underwater, San Diego Zoo, California

Ingo Arndt / Giant Panda (Ailuropoda melanoleuca) in tree, China

Norbert Wu / Chocolate Labrador Retriever (Canis familiaris) puppy being bathed, Monterey, California

Cyril Ruoso / Bonobo (Pan paniscus) conservationist clearing selected area for agriculture, but allowing for greater forest protection for the apes, Democratic Republic of the Congo

Cyril Ruoso / Bonobo (Pan paniscus) orphan, Lola Ya Bonobo Sanctuary, Democratic Republic of the Congo

Pete Oxford / Scarlet Macaw (Ara macao) feathers used in headdress by Wai-wai woman, Guyana

Pete Oxford / Scarlet Macaw (Ara macao) feathers used in headdress by Wai-wai man, Guyana

Pete Oxford / Scarlet Macaw (Ara macao) feathers used in headdress by Wai-wai men, Guyana

Pete Oxford / Cassava (Manihot esculenta) roots being carried by Wai-wai woman, Guyana

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) fourteen year old female, Gombe National Park, Tanzania

Ingo Arndt / American Alligator (Alligator mississippiensis) in water, Everglades National Park, Florida

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Julie McCarthy, bottle-feeding three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Julie McCarthy, holding three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Julie McCarthy, weighing three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Deanna Troeauga, with three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Deanna Troeauga, placing three week old orphaned pup in water, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Deanna Troeauga, drying off three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Kevin Schafer / Australian King Parrot (Alisterus scapularis) female sitting on tourist, Lamington National Park, Queensland, Australia

Kevin Schafer / Australian King Parrot (Alisterus scapularis) flock and Crimson Rosella (Platycercus elegans) being fed by tourist, Lamington National Park, Queensland, Australia

Thomas Marent / Eastern Chimpanzee (Pan troglodytes schweinfurthii), Sweetwaters Game Reserve, Kenya

Thomas Marent / Eastern Chimpanzee (Pan troglodytes schweinfurthii), Sweetwaters Game Reserve, Kenya

Thomas Marent / Black-headed Night Monkey (Aotus nigriceps) at night, Tambopata-Candamo Nature Reserve, Peru

Pete Oxford / Pacific Horned Frog (Ceratophrys stolzmanni) in defensive posture, native to South America

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) biologist, Rebecca Cliffe, holding sloth while traveling in boat to release site, Aviarios Sloth Sanctuary, Costa Rica

Richard Du Toit / Burchell's Zebra (Equus burchellii) flehming, Rietvlei Nature Reserve, South Africa

Mark Raycroft / Weimaraner (Canis familiaris)