Nick Garbutt / Fat-tailed dwarf lemur (Cheirogaleus medius) climbing down branch at night, after emergence from hibernation in November, Kirindy Forest, West Madagascar.

Adrian Davies / Knapweed broomrape (Orobanche elatior), a parasite of Greater knapweed (Centaurea scabiosa), with host, Hampshire, UK, June.

Adrian Davies / Deathcap (Amanita phalloides), one of the deadliest fungi, Sussex, UK, October, focus stacked.

Adrian Davies / Common poppy (Papaver rhoeas) flowering, Surrey, UK, July.

Adrian Davies / Bluebell (Hyacinthoides non-scripta) woods, Micheldever, Hampshire, UK, May.

Adrian Davies / Winter aconite (Eranthis hyemalis) flowering, Surrey, England, March.

Adrian Davies / Water lettuce (Pistia stratiotes) with submerged roots in aquarium.

Adrian Davies / Nepenthes fusca hybrid (Nepenthes N.fusca x N.robcantleyi), Fluorescing under UV light, studio environment.

Adrian Davies / Common haircap moss (Polytrichum commune) Snowdonia, Wales, UK.

Adrian Davies / Sheathed woodtuft (Kuehneromyces mutabilis) in 'fairy ring' on rotting mossy wood, Surrey, UK, October.

Adrian Davies / Bluebell (Hyacinthoides non-scripta) Surrey, UK, May.

Adrian Davies / Bluebell (Hyacinthoides non-scripta) Surrey, UK, May.

Adrian Davies / Rosy sundew (Drosera hamiltonii) curled flower bud, studio environment.

Jean E. Roche / Donkey (Equus asinus) female and young, used for tourist rides at Fouillouse hamlet, birthplace of Abbe Pierre family. Provence-Alpes-Cotes-d'Azur, France. July.

Michael Hutchinson / Grey seal (Halichoerus grypus) adult male portrait. Donna Nook, Lincolnshire, UK. November.

Joel Sartore / Photo Ark / Greater siren salamander(Siren lacertina), Santa Fe Community College Teaching Zoo, Gainesville, Florida, USA. Captive.

Joel Sartore / Photo Ark / Greater siren salamander(Siren lacertina), Santa Fe Community College Teaching Zoo, Gainesville, Florida, USA. Captive.

Joel Sartore / Photo Ark / Greater siren salamander (Siren lacertina), Santa Fe Community College Teaching Zoo, Gainesville, Florida, USA. Captive.

Joel Sartore / Photo Ark / Lesser siren salamander (Siren cf. intermedia), originally from a tributary of the Choctawhatchee River in Florida. This is an undescribed species and is new to science. Captive.

Joel Sartore / Photo Ark / Lesser siren salamander (Siren cf. intermedia), originally from a tributary of the Choctawhatchee River in Florida. This is an undescribed species and is new to science. Captive.

Roland Seitre / Great blue heron (Ardea herodias) spearing Greater Siren Salamander (Siren lacertina) with beak, Lake Apopka, Florida, USA.

Roland Seitre / Great blue heron (Ardea herodias) swallowing Greater Siren Salamander (Siren lacertina), Lake Apopka, Florida, USA.

Roland Seitre / Great blue heron (Ardea herodias) swallowing Greater Siren Salamander (Siren lacertina), Lake Apopka, Florida, USA.

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) male, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The s...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) male, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The s...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) male, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The s...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) male, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The s...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) female, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) female, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) female, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) female, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The...

Joel Sartore / Photo Ark / Yangtze giant softshell turtle (Rafetus swinhoei) male, portrait, Suzhou Zoo, China. Critically endangered. Captive. Both Yangtze giant softshell turtles at this facility are over 100 years old. The s...

Roger Powell / Pied kingfisher (Ceryle rudis) pair displaying whilst perched on bush, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Little egret (Egretta garzetta) perched on top of a metal post, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Grey heron (Ardea cinerea) perched on top of a fishpond net, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / White-breasted kingfisher (Halcyon smyrnensis), a predator of migratory songbirds, perched on a fishpond hawser with a lesser whitethroat (Sylvia curruca) in its beak, K'Far Ruppin kibbutz, Jorda...

Roger Powell / Yellow-vented bulbul (Pycnonotus goiavier) male perched on a dead bamboo stem, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Yellow-vented bulbul (Pycnonotus goiavier) pair on a dead bamboo stem, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Chukar (Alectoris chukar) male on guard, farmland, K'Far Ruppin, Jordan Valley, Israel, March.

Roger Powell / Rose-ringed parakeet (Alexandrinus krameri) male perched on a branch with a nut kernel in beak, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Rose-ringed parakeet (Alexandrinus krameri) male perched on a branch with a nut kernel in beak, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Common stonechat (Saxicola torquatus) female perched on seaweed at tideline on beach, Low Newton, Northumberland, England, UK, February.

Roger Powell / Coal tit (Periparus ater) perched on a bare willow branch, Leighton Moss RSPB Reserve, Lancashire, England, UK, January.

Shane Gross / Humpback whale (Megaptera novaeangliae) female surfacing with its fin pointed towards the surface, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) swimming to the surface near freediver, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) surfacing next to snorkeler, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) ascending towards surface, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Crown jellyfish (Cephea cephea) floating near surface, Moorea, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) swimming towards surface, Tubuai, French Polynesia, Pacific Ocean.

Jussi Murtosaari / Boreal common frog (Rana temporaria) dying in the snow, having been awoken from hibernation by a warm spell in the morning. It was unable to find cover night and lay dying on a frozen lake, with the a...

Lynn M. Stone / English setter sitting among summer flowers, portrait, Connecticut, USA. July.

Lynn M. Stone / Bichon frise dog standing among spring flowers, portrait, Connecticut, USA. May.

Lynn M. Stone / Bichon frisedog standing among spring flowers, portrait, Connecticut, USA. May.

Lynn M. Stone / Two Flat-coated retriever puppies sitting next to Spring daffodils, portrait, Connecticut, USA. April.

Lynn M. Stone / Black Labrador retriever sitting among summer flowers, head portrait, Maine, USA. June.

Lynn M. Stone / Chow chow, black, smooth-haired variety, sitting among wild roses on seaside cliffs, Pemaquid Point, Maine, USA. June.

Lynn M. Stone / Australian shepherd, head portrait, Alaska, USA. April.

Lynn M. Stone / Brittany spaniel, female, standing next to spring Daffodils, portrait, Waterford, Connecticut, USA. April.

Lynn M. Stone / Brittany spaniel, liver and white female, standing portrait, Connecticut, USA. December.

Lynn M. Stone / Black Labrador retriever puppy standing in autumn leaves, Haddam, Connecticut, USA. November.

Lynn M. Stone / Black Labrador retriever puppy sitting in autumn leaves, Haddam, Connecticut, USA. November.

Lynn M. Stone / Yellow Labrador retriever puppy sitting among autumn leaves, Haddam, Connecticut, USA. November.

Lynn M. Stone / Yellow Labrador retriever puppy standing on autumn leaves, Haddam, Connecticut, USA. November.

Lynn M. Stone / English setter puppy, aged 6 months, sitting among autumn leaves, Haddam, Connecticut, USA. November.

Lynn M. Stone / Australian cattle dog next to autumnal foliage, head portrait, Rhode Island, USA. November.

Lynn M. Stone / Australian cattle dog (Blue heeler variety) standing next to pond, portrait, Coventry, Rhode Island, USA. November.

Lynn M. Stone / Siberian husky, female, standing on grass, portrait, Haddam, Connecticut, USA. October.

Lynn M. Stone / Jack Russell terrier puppy standing on grass in autumn, portrait, Haddam, Connecticut, USA. October.

Lynn M. Stone / American pit bull, male, standing on grass and autumn leaves, portrait, Haddam, Connecticut, USA. October.

Lynn M. Stone / American pit bull, male, sitting, head portrait, Haddam, Connecticut, USA. October.

Lynn M. Stone / American pit bull, male, standing on grass in autumn, portrait, Haddam, Connecticut, USA. October.

Lynn M. Stone / Airedale terrier, female, sitting on beach, portrait, Madison, Connecticut, USA. October.

Lynn M. Stone / Black silkie hen amongst garden flowers in spring, Ashford, Connecticut, USA. May.

Lynn M. Stone / Serama rooster crowing in spring garden, Ashford, Connecticut, USA. May.

Lynn M. Stone / Airedale terrier sitting next to stone wall in woodland, head portrait, Litchfield, Connecticut, USA. May.

Lynn M. Stone / Siberian husky puppy sitting on grass, portrait, Litchfield, Connecticut, USA. April.

Lynn M. Stone / Siberian husky puppy sitting next to spring Daffodils, head portrait, Litchfield, Connecticut, USA. April.

Lynn M. Stone / Australian shepherd, male, standing on rocky beach with mountains in background, portrait, Homer, Alaska, USA. April.

Lynn M. Stone / Yorkshire terrier puppy, aged 14 weeks, resting front paws on wooden box next to summer flowers, portrait, Ashford, Connecticut, USA. September.

Lynn M. Stone / Akita sitting at water's edge, Connecticut River, Connecticut, USA. September.

Lynn M. Stone / Two yellow Labrador retriever puppies, males, side by side in wooden box in garden next to summer flowers, Haddam, Connecticut, USA. July.

Lynn M. Stone / Yellow Labrador retriever puppy sitting in summer garden, head portrait, Haddam, Connecticut, USA. July.

Lynn M. Stone / Jack Russell terrier, rough coat variety, standing in summer garden, portrait, Wilbraham, Massachusetts, USA. July.

Lynn M. Stone / Yellow Labrador retriever sitting next to spring Daffodils, head portrait, Waterford, Connecticut, USA. April.

Lynn M. Stone / Golden retriever standing, head portrait, Portage, Alaska, USA. April.

Lynn M. Stone / Brittany spaniel, female, standing in spring garden, portrait, Waterford, Connecticut, USA. April.

Lynn M. Stone / Australian shepherd, male, sitting on rocky beach with mountains in background, portrait, Homer, Alaska, USA. April.

Lynn M. Stone / Yorkshire terrier standing among spring flowers, portrait, Haddam, Connecticut, USA. April.

Lynn M. Stone / American Cocker spaniel, head portrait, Haddam, Connecticut, USA. April.

Lynn M. Stone / Shetland sheepdog standing among springf foliage, portrait, Haddam, Connecticut, USA. April.

Lynn M. Stone / Irish setter, male, sitting next to spring Daffodils, Waterford, Connecticut, USA. April.

Lynn M. Stone / Australian cattle dog (Blue heeler variety) standing among spring flowers, portrait, Waterford, Connecticut, USA. April.

Lynn M. Stone / Akita puppy, standing in garden, portrait, Haddam, Connecticut, USA. September.

Lynn M. Stone / German shepherd dog, female, sitting in summer garden, head portrait, Jacksonville, Oregon, USA. July.

Lynn M. Stone / German shepherd dog, female, standing on rocks, portrait, Jacksonville, Oregon, USA. July.

Lynn M. Stone / Flat-coated retriever puppy, sitting next to summer flowers, head portrait, Haddam, Connecticut, USA. July.