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 / Verreaux's sifaka lemur (Propithecus verreauxi) baby, called Tahina, aged two months, clinging to soft toy. Besancon Zoo, France. January. Captive.

Michael Hutchinson / Verreaux's sifaka lemur (Propithecus verreauxi) baby, called Tahina, aged two months, clinging to soft toy. Besancon Zoo, France. January. Captive.

Michael Hutchinson / Grey seal (Halichoerus grypus) pup being photographed by two young photographers at close-range. Donna Nook, Lincolnshire, UK. November.

Michael Hutchinson / Grey seal (Halichoerus grypus) pup being photographed by two young photographers at close-range. Donna Nook, Lincolnshire, UK. November.

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.

Roger Powell / Pied kingfisher (Ceryle rudis) female landing in a bush next to mate after digging nest hole, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

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

Roger Powell / Pied kingfisher (Ceryle rudis) female landing in a bush next to mate after digging nest hole, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Pied kingfisher (Ceryle rudis) male landing in a bush next to mate after digging nest hole, K'Far Ruppin kibbutz fishponds, 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 and female pair feeding on the edge of farmland, K'Far Ruppin, Jordan Valley, Israel, March.

Roger Powell / Common stonechat (Saxicola torquatus) female perched on a bramble tendril with male displaying behind her, Low Newton, Northumberland, England, UK, February.

Shane Gross / Humpback whale (Megaptera novaeangliae) female surfacing next to another Humpback whale swimming on its back beside a freediver, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) male and female engaging in courtship, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Freediver swimming with two Humpback whales (Megaptera novaeangliae), Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Freediver swimming between two Humpback whales (Megaptera novaeangliae), Tubuai, French Polynesia, Pacific Ocean.

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

Shane Gross / Humpback whale (Megaptera novaeangliae) swimming above freediver as another dives behind them, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) pair swim together, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) swims beside two freedivers, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) pair swim together, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) female and two males in courtship, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) male and female pair courting, Tubuai, French Polynesia, Pacific Ocean.

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

Jussi Murtosaari / Silver-washed fritillary (Argynnis paphia) male flying towards flower where female is resting, Finland, July.

Jussi Murtosaari / Common European viper (Vipera berus) melanistic morph leaving hibernation with female basking in the background, Finland, April.

Jussi Murtosaari / Common redshank (Tringa totanus) male chasing female along rocky shore, Finland, May.

Roland Seitre / Possible South China giant salamander (Andrias sligoi) pair held captive in wooden bowl, Canton market, Guangzhou, China. Species originally identified as Andrias davidianus but the individuals were s...

Lynn M. Stone / Two Whooper swans (Cygnus cygnus) with three cygnets on pond, Southwest Iceland. June.

Lynn M. Stone / Icelandic horse femalefeeding foal in meadow of buttercups (Ranunculus sp) southwest Iceland. June.

Lynn M. Stone / Icelandic horse nibbling on the back of another horse, southwest Iceland. June.

Lynn M. Stone / Trumpeter swans (Cygnus buccinator) pair, side by side on pond, Homer, Alaska, USA. April.

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

Lynn M. Stone / Two Tundra swans (Cygnus columbianus) swimming in river tributary to Chesapeake Bay, a key wintering grounds for Tundra swans, Annapolis, Maryland, USA. February.

Lynn M. Stone / Limpkin (Aramus guarauna) with freshwater mussel in beak, wading in shallow water, Myakka River State Park, Florida, USA. December.

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 / Woman photographing two Florida sandhill cranes (Grus canadensis pratensis) foraging in wet prairie, Myakka River State Park; Sarasota, Florida, USA. April.

Lynn M. Stone / Two Whippets, siblings, sitting side by side in summer garden, portrait, Haddam, Connecticut, USA. June.

Lynn M. Stone / Common loon (Gavia immer) carrying chick on its back on lake, New Hampshire, USA. June.

Lynn M. Stone / Marbled godwit (Limosa fedoa) feeding on Mole crab (Emerita sp.) on beach, Gulf of Mexico, Florida, USA. May.

Lynn M. Stone / Two Shetland sheepdogs sitting and lying down in snow, portrait, Waterford, Connecticut, USA. December.

Lynn M. Stone / Sharp-shinned hawk (Accipiter striatus) with White-throated sparrow (Zonotrichia albicollis) prey, perched in shrub vines, Milford, Connecticut, USA. December.

Lynn M. Stone / Scotch Highland bull, right, and cow in pasture, Stafford Springs, Connecticut, USA. October.

Lynn M. Stone / Northern water snake (Natrix sipedon) stalking Bull frog (Lithobates catesbeianus) at pond's edge, Wallingford, Connecticut, USA. August.

Lynn M. Stone / Common loon (Gavia immer) offering fish prey to chick on lake at sunset, New Hampshire, USA. July.

Lynn M. Stone / Common loon (Gavia immer) carrying two chicks on its back on lake; New Hampshire, USA. July.

Nick Upton / Buff-tailed bumblebees (Bombus terrestris) two males competing to mate with queen on a garden patio, Pembrokeshire, Wales, UK. August.

Nick Upton / Buff-tailed bumblebee (Bombus terrestris) male mating with queen on garden fence post, Pembrokeshire, Wales, UK. August.

Nick Upton / Buff-tailed bumblebee (Bombus terrestris) male mating with queen on garden fence post, Pembrokeshire, Wales, UK. August.

Nick Upton / Wool carder bee (Anthidium manicatum) male, flying in to attack a Buff-tailed bumblebee (Bombus terrestris) nectaring on Lamb's ear (Stachys byzantina) flowers within its territory in garden, Wiltshir...

Nick Upton / Wool carder bee (Anthidium manicatum) male, attacking a Buff-tailed bumblebee (Bombus terrestris) nectaring on Lamb's ear (Stachys byzantina) flowers within its territory in garden, Wiltshire, UK. Jul...

Nick Upton / Wool carder bee (Anthidium manicatum) male, flying in to attack a Buff-tailed bumblebee (Bombus terrestris) nectaring on Lamb's ear (Stachys byzantina) flowers within its territory in garden, Wiltshir...

Nick Upton / Wool carder bees (Anthidium manicatum) pair, male mating with female as she nectars on Lamb's ear (Stachys byzantina) flowers in garden, Wiltshire, UK. July.

Nick Upton / Common pond skater / Water strider (Gerris lacustris) on surface of garden pond with Whitefly (Aleyrodidae) prey impaled on its rostrum, Wiltshire, UK. June.

Nick Upton / Common pond skater / Water strider (Gerris lacustris) on surface of garden pond with Bluebottle (Calliphora vomitoria) prey impaled on its rostrum, Wiltshire, UK. June.

Nick Upton / Two Wood-carving leafcutter bees (Megachile ligniseca) entering hand-made insect hotel, showing a range of bamboo stems and drilled hole sizes for different species, in garden, Wiltshire, UK. July.

Nick Upton / Wood-carving leafcutter bee (Megachile ligniseca) male, flying towards female entering nest hole in an insect hotel, Wiltshire, UK. July.

Nick Upton / Large red damselflies (Pyrrhosoma nymphula) pair, resting on leaf in garden pond, Wiltshire, UK. May.

Jack Dykinga / Harris's hawks (Parabuteo unicinctus) pair, nesting at top of Saguaro cactus (Carnegiea gigantea) with rainbow in stormy sky above, Sonoran Desert, BLM land near Oracle, Arizona , USA. July.

Jack Dykinga / Two Burrowing owls (Athene cunicularia) juveniles, panting and holding wings away from body to cool down, whilst resting in shade outside their burrow in Marana, Sonoran Desert, Arizona, USA. July.

Jack Dykinga / Two Burrowing owls (Athene cunicularia) juvenile with female behind, in farmland, Marana, Sonoran Desert, Arizona, USA. July.

Jack Dykinga / Two Burrowing owls (Athene cunicularia) juveniles, panting and holding wings away from body to cool down, whilst resting in shade outside their burrow in Marana, Sonoran Desert, Arizona, USA. July.

Jack Dykinga / Two Burrowing owls (Athene cunicularia) juveniles, panting and holding wings away from body to cool down, whilst resting in shade outside their burrow in Marana, Sonoran Desert, Arizona, USA. July. On...

Sylvain Cordier / Black panther / African leopard (Panthera pardus pardus) melanistic form, moving at night in dry shrub savanna carrying Gunther's dik-dik (Madoqua guentheri) prey in mouth, Laikipia County, Keny...

Sylvain Cordier / Black panther / African leopard (Panthera pardus pardus) melanistic form, moving at night in dry shrub savannah carrying Gunther's dik-dik (Madoqua guentheri) prey in mouth, Laikipia County, Ken...

Sylvain Cordier / Black panther / African leopard (Panthera pardus pardus) melanistic form, moving at night in dry shrub savannah carrying Gunther's dik-dik (Madoqua guentheri) prey in mouth, Laikipia County, Ken...

Maxime Aliaga / Man releasing two Yellow-spotted Amazon river turtle (Podocnemis unifilis) hatchlings as part of conservation program run by Peruvian National Park authority and local communities to restore this vuln...

Maxime Aliaga / Two Yellow-spotted Amazon river turtles (Podocnemis unifilis) basking in sun with butterfly flying over. Pacaya Samiria National Park, Loreto, Peru.

Maxime Aliaga / Two Yellow-spotted Amazon river turtles (Podocnemis unifilis) basking in sun with butterfly perched on one's head. Pacaya Samiria National Park, Loreto, Peru.

Maxime Aliaga / Two White-lipped peccaries (Tayassu pecari) greeting each other. Peru

Maxime Aliaga / Two Blue-and-yellow macaws (Ara ararauna) eating clay in middle of Southern mealy parrot (Amazona farinosa) flock on Clay lick. Tambopata National Reserve, Madre de Dios, Peru.

Maxime Aliaga / Two Blue-and-yellow macaws (Ara ararauna) with flock of Scarlet macaws (Ara macao) eating clay on Clay lick. Tambopata National Reserve, Madre de Dios, Peru.

Hermann Brehm / Green woodpecker (Picus viridis) pair, mating outside nesting hole, Germany.

Kirkendall-Spring / Misty morning with two leafless trees in the foreground, Lower Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA. January 2022

Lorraine Bennery / Barn swallow (Hirundo rustica) landing on twig next to another that is calling, La Brenne Regional Nature Park, France.

Gabriel Rojo / Aerial view of tourists watching Southern right whales (Eubalaena australis) from beach, Peninsula Valdes, El Doradillo Nature Reserve, UNESCO World Heritage Site, Chubut Province, Patagonia, Argentin...

David Tipling / Northern gannet (Morus bassanus) standing on the corpse of its mate, killed by Avian Influenza, Troup Head RSPB Reserve, Aberdeenshire, UK. August, 2022.

David Tipling / Northern gannet (Morus bassanus) standing next to the corpse of its mate, killed by Avian Influenza, Troup Head RSPB Reserve, Aberdeenshire, UK. September, 2022

Andy Trowbridge / Two juvenile Kea (Nestor notabilis) playing on a mossy rock, Arthur's Pass National Park, South Island, New Zealand.

Harry Collins / Belted kingfisher (Megaceryle alcyon) entering the frame and landing on a perch with its prey, a small minnow (Cypriniformes). The bird then rearranges the fish and swallows it headfirst. The bird the...

Nigel Cattlin / Yellow and white working Cocker spaniel bitch with puppies, aged two weeks, sleeping, Berkshire, UK. December

Nigel Cattlin / Yellow and white working Cocker spaniel bitch with puppies, aged two weeks, sleeping, Berkshire, UK. December

Nick Garbutt / Puma (Puma concolor) female with two cubs, aged six months, walking over rocky outcrop, Torres del Paine National Park / Estancia Laguna Armarga, Patagonia, Chile.

Nick Garbutt / Two Sulawesi black macaques / Celebes crested macaques (Macaca nigra) sitting on beach drinking from plastic soft drinks bottles washed up on beach, Tangkoko National Park, northern Sulawesi, Indonesi...

Nick Garbutt / Two Puma (Puma concolor) cubs, aged six months, playing and climbing on small tree in fresh snow, Torres del Paine National Park / Estancia Laguna Armarga, Patagonia, Chile.

Nick Garbutt / Two Sulawesi black macaques / Celebes crested macaques (Macaca nigra) foraging through rubbish washe up on beach, one holding up plastic soft drinks bottle, Tangkoko National Park, northern Sulawesi,...

Nick Garbutt / Two Puma (Puma concolor) cubs, aged six months, playing and climbing on small tree in fresh snow, Torres del Paine National Park / Estancia Laguna Armarga, Patagonia, Chile.

Nick Garbutt / Lions (Panthera leo) courting pair in early morning light, near Ndutu, Ngorongoro Conservation Area / Serengeti National Park boundary, northern Tanzania.

Nick Garbutt / Lion (Panthera leo) female, resting on tree branch in Acacia woodland, snarling at juvenile male Lion close by, Ndutu, Ngorongoro Conservation Area / Serengeti National Park border, Tanzania.

Nick Garbutt / Leopard (Panthera pardus) female with sub-adult cub, climbing Acacia (Acacia sp.) tree in evening light. Ndutu area, Serengeti / Ngorongoro Conservation Area, Tanzania.

Nick Garbutt / Lion (Panthera leo) female, resting in tree during middle of day to escape the heat with juvenile male Lion approaching, near Ndutu, Ngorongoro Conservation Area / Serengeti National Park border, Tanz...

Nick Garbutt / Cheetah (Acinonyx jubatus) female, with two cubs, aged approx. 5 months, hunting White-bearded wildebeest (Connochaetes taurinus albojubatus) juvenile, Ndutu area, Serengeti / Ngorongoro Conservation...

Nick Garbutt / Cheetah (Acinonyx jubatus) female chasing Thomson's gazelle (Eudorcas thompsonii) female, running sequence, Ndutu area, Serengeti / Ngorongoro Conservation Area, Tanzania. Composite of six images...

Nick Garbutt / Lion (Panthera leo) male, persuing Lioness on savanna in rain storm, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania.