Andres M. Dominguez / Eurasian kingfisher (Alcedo atthis) male, perched on branch over pond with tadpole prey in beak, backlit at dawn, Sierra de Grazalema Natural Park, Cadiz, Spain. October.
Andres M. Dominguez / Eurasian kingfisher (Alcedo atthis) male, perched on a rock in pool, backlit at dawn, Sierra de Grazalema Natural Park, Cadiz, Spain. October.
Doug Gimesy / Little pied cormorant (Microcarbo melanoleucos) standing on intertidal rocks, feeding on fish prey, Port Philip Bay, Victoria, Australia.
Gabriel Rojo / Geoffroy's cat (Leopardus geoffroyi) walking past seaweed covered rocks on beach, Punta Norte Nature Reserve, Peninsula Valdes, Chubut Province, Patagonia, Argentina.
Gabriel Rojo / Geoffroy's cat (Leopardus geoffroyi) walking along beach with Gulls (Larus sp.) in background, Punta Norte Nature Reserve, Peninsula Valdes, Chubut Province, Patagonia, Argentina.
George Sanker / Coyote (Canis latrans) hunting in a wetland meadow in summer, Yellowstone National Park, Wyoming, USA. June.
Jussi Murtosaari / Fieldfare (Turdus pilaris) perched in Rowan (Sorbus sp.) tree, feeding on berries, Finland. October.
Jussi Murtosaari / Grey wolf (Canis lupus) shaking fur dry after swimming, Finland. August.
Jussi Murtosaari / Bank vole (Clethrionomys glareolus) standing on hind legs, feeding on Strawberry (Fragaria sp.) leaves, Finland. July.
Jussi Murtosaari / Lesser purple emperor butterfly (Apatura ilia) male, in flight, Finland. July.
Jussi Murtosaari / Peacock butterfly (Aglais io) in flight over wildflowers, Finland. May.
Mark Carwardine / Brown bear (Ursus arctos) female, standing at edge of river, Great Bear Rainforest, British Columbia, Canada. October.
Marie Read / Varied thrush (Ixoreus naevius) male, perched on branch, singing in spring, Eagle River, Alaska, USA. May.
Marie Read / Pacific loons (Gavia pacifica) pair in breeding plumage, on water, Anchorage, Alaska, USA. May.
Marie Read / Northern parula (Parula americana) male in breeding plumage, perched in flowering Eastern redbud (Cercis canadensis) in spring, Ohio, USA. April.
Oliver Hellowell / Red squirrel (Sciurus vulgaris) sitting upright among heather, in woodland garden, Perthshire, Scotland, UK. September. Cropped.
Pal Hermansen / Musk ox (Ovibos moschatus) pair mating, Dovrefjell-Sunndalsfjella National Park, Norway. September.
Roger Powell / Red-throated diver (Gavia stellata) male, running over the water at speed and taking flight, Kongsfjordfjellet, Finnmark, Norway. June.
Roger Powell / Two Ruffs (Calidris pugnax) male, fighting at the lek, Pokka, Finland, Lapland. May.
Roger Powell / Four Greylag geese (Anser anser) flying low over lake, East Chevington Reserve, Druridge Bay, Northumberland, UK. November.
Sven Zacek / Common blue damselflies (Enallagma cyathigerum) pair, in flight over bog pool, Nigula Nature Protection Area, Parnumaa county, Estonia.
Sven Zacek / Capercaillie (Tetrao urogallus) male, with some tail feathers missing, lekking at sunset, Tartumaa county, Estonia.
Sven Zacek / Capercaillie (tetrao urogallus) male, lekking perched on top of a Pine tree at dusk, Tartumaa county, Estonia.
Tui De Roy / Green turtle (Chelonia mydas) swimming with school of Barracuda (Sphyraena sp.) behind, Cousins Rock, near Santiago Island, Galapagos Islands. Endangered.
Staffan Widstrand / RF - Two Ruffs (Philomachus pugnax) male, fighting at lek site, Varanger Peninsula, Finnmark, Norway. June. (This image may be licensed either as rights managed or royalty free.)
Staffan Widstrand / RF - Atlantic guillemot (Uria aalge) standing on rock spreading its wings at sunset, with colony behind, Hornoya bird cliff Island, Vardoe, Varanger Peninsula, Finnmark, Norway. June. (This image may...
Guy Edwardes / Silver-studded blue (Plebejus argus), backlit at sunset, Rhodope Mountains, Bulgaria, June
Joel Sartore / Photo Ark / Blunt-nosed leopard lizard (Gambelia sila) looking around. The animal leaves the frame. Fresno Chaffee Zoo, California. Captive.
Joel Sartore / Photo Ark / Eastern quoll (Dasyurus viverrinus) lying down and looking at the camera, Zoo Leipzig. Captive. Endangered.
Joel Sartore / Photo Ark / Marbled cat (Pardofelis marmorata longicaudata) looking towards the camera and lying down. The animal hisses and bares its teeth. Al Bustan Zoological Centre, Sharjah. Captive.
Joel Sartore / Photo Ark / San Bernardino kangaroo rat (Dipodymys merriami parvus) looking at the camera, then the animal partially leaves frame, San Diego Zoo Safari Park, Escondido, California. Captive. Federally endangered.
Joel Sartore / Photo Ark / Bigclaw crayfish (Faxonius placidus) female oxygenating eggs by fanning them, upper Duck River, Coffee County, Tennessee, USA. Controlled conditions.
Joel Sartore / Photo Ark / Great hornbill (Buceros bicornis) looking around, Al Bustan Zoological Centre, Sharjah. Captive.
Joel Sartore / Photo Ark / Blyth's tragopan (Tragopan blythii) male looking around, San Diego Zoo. Captive.
Joel Sartore / Photo Ark / Red bird-of-paradise (Paradisaea rubra) male looking around and vocalising, Walsrode Bird Park. Captive.
Joel Sartore / Photo Ark / Indochinese green magpie (Cissa hypoleuca) female looking around, Los Angeles Zoo & Botanical Gardens. Captive.
Joel Sartore / Photo Ark / Shaheen peregrine falcon (Falco peregrinus peregrinator) looking around and vocalising, private collection, Dubai. Captive.
Joel Sartore / Photo Ark / Siberian crane (Leucogeranus leucogeranus) female looking around, then the animal lowers its head and ruffles its feathers. International Crane Foundation, Baraboo, Wisconsin. Controlled condiitons. C...
Joel Sartore / Photo Ark / Mountain yellow-legged frog (Rana muscosa) looking at the camera, then the animal jumps out of the frame. Oakland Zoo, California. Captive. Endangered.
Staffan Widstrand / RF - Ruff (Philomachus pugnax) male, displaying at lek site, Varanger Peninsula, Finnmark, Norway. June. (This image may be licensed either as rights managed or royalty free.)
Paul Harcourt Davies / Elephant hawkmoth (Deilephila elpenor) recently emerged, resting on a leaf, Vieste, Gargano, Puglia, Italy. April.
Paul Harcourt Davies / Southern festoon butterfly (Zerynthia polyxena cassandra) freshly emerged resting on leaf and drying its wings, Podere Montecucco, Gargano, Puglia, Italy. April.
Paul Harcourt Davies / Mullein moth (Cucullia verbasci) caterpillar, crawling on plant stem, nr Lago di Varano, Gargano, Puglia, Italy. April.
Paul Harcourt Davies / Common blue butterflies (Polyommatus icarus) pair mating on flower, male on the right, Umbria, Italy. May.