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Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
01741964
Andy Rouse / Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
Lioness (Panthera leo) at night, head portrait, Zimanga private game reserve, KwaZulu-Natal, South Africa.
01741975
Ann & Steve Toon / Lioness (Panthera leo) at night, head portrait, Zimanga private game reserve, KwaZulu-Natal, South Africa.
Common genet (Genetta genetta) at night, portrait, Shompole, Kenya.
01741973
Ann & Steve Toon / Common genet (Genetta genetta) at night, portrait, Shompole, Kenya.
Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
01741966
Andy Rouse / Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
Sparkling violetear hummingbird (Colibri coruscans) perched on branch, reaching up to catch a bee, Cloud forest, Ecuador.
01741963
Andy Rouse / Sparkling violetear hummingbird (Colibri coruscans) perched on branch, reaching up to catch a bee, Cloud forest, Ecuador.
Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
01741962
Andy Rouse / Dalmatian pelican (Pelecanus crispus) landing on lake, backlit by sunlight, Lake Kerkini, Greece.
Pygmy seahorse (Hippocampus bargibanti) among a Sea fan (Muricella sp.) on a coral reef, Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
01741949
Alex Mustard / Pygmy seahorse (Hippocampus bargibanti) among a Sea fan (Muricella sp.) on a coral reef, Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Usambara three-horned chameleon (Trioceros deremensis) looking around, Tiergarten Schonbrunn, Vienna. Captive.
01739333
Joel Sartore / Photo Ark / Usambara three-horned chameleon (Trioceros deremensis) looking around, Tiergarten Schonbrunn, Vienna. Captive.
Usambara three-horned chameleon (Trioceros deremensis) looking around, Tiergarten Schonbrunn, Vienna. Captive.
01739332
Joel Sartore / Photo Ark / Usambara three-horned chameleon (Trioceros deremensis) looking around, Tiergarten Schonbrunn, Vienna. Captive.
Hoge's side-necked turtle (Ranacephala hogei) looking around. This species is endemic to the eastern Atlantic Forest of Brazil. Turtle Island, Graz, Austria. Critically endangered. Controlled conditio...
01739331
Joel Sartore / Photo Ark / Hoge's side-necked turtle (Ranacephala hogei) looking around. This species is endemic to the eastern Atlantic Forest of Brazil. Turtle Island, Graz, Austria. Critically endangered. Controlled conditio...
Black softshell turtle (Nilssonia nigricans) extending neck, showing folded skin, and looking around. This species is endemic to India and Bangladesh. Turtle Island, Graz, Austria. Critically endanger...
01739330
Joel Sartore / Photo Ark / Black softshell turtle (Nilssonia nigricans) extending neck, showing folded skin, and looking around. This species is endemic to India and Bangladesh. Turtle Island, Graz, Austria. Critically endanger...
Monocled cobra (Naja kaouthia) albino raised and flaring its hood in threat display, Amphibian Foundation, Atlanta. Captive.
01739329
Joel Sartore / Photo Ark / Monocled cobra (Naja kaouthia) albino raised and flaring its hood in threat display, Amphibian Foundation, Atlanta. Captive.
Monocled cobra (Naja kaouthia) albino looking round and flairing its hood, Amphibian Foundation, Atlanta. Captive.
01739328
Joel Sartore / Photo Ark / Monocled cobra (Naja kaouthia) albino looking round and flairing its hood, Amphibian Foundation, Atlanta. Captive.
East African green mamba (Dendroaspis angusticeps) looking and flicking its tongue, Kentucky Reptile Zoo, Kentucky. Captive.
01739327
Joel Sartore / Photo Ark / East African green mamba (Dendroaspis angusticeps) looking and flicking its tongue, Kentucky Reptile Zoo, Kentucky. Captive.
Eastern diamondback rattlesnake (Crotalus adamanteus) looking and flicking its tongue, Kentucky Reptile Zoo, Kentucky. Captive.
01739326
Joel Sartore / Photo Ark / Eastern diamondback rattlesnake (Crotalus adamanteus) looking and flicking its tongue, Kentucky Reptile Zoo, Kentucky. Captive.
Eastern cottontail rabbit (Sylvilagus floridanus similis) looking around and sniffing the air. The animal leaves the frame. Wildlife Haven and Rehabilitation Centre, Ile des Chenes, Canada. Controlled...
01739325
Joel Sartore / Photo Ark / Eastern cottontail rabbit (Sylvilagus floridanus similis) looking around and sniffing the air. The animal leaves the frame. Wildlife Haven and Rehabilitation Centre, Ile des Chenes, Canada. Controlled...
Javan small-toothed palm civet (Arctogalidia trivirgata trilineata) male looking around and baring teeth, Batu Secret Zoo and Eco Green Park, Batu. Captive.
01739324
Joel Sartore / Photo Ark / Javan small-toothed palm civet (Arctogalidia trivirgata trilineata) male looking around and baring teeth, Batu Secret Zoo and Eco Green Park, Batu. Captive.
Javan small-toothed palm civet (Arctogalidia trivirgata trilineata) male yawning, Prigen Conservation Breeding Ark, Java, Indonesia. Controlled conditions.
01739323
Joel Sartore / Photo Ark / Javan small-toothed palm civet (Arctogalidia trivirgata trilineata) male yawning, Prigen Conservation Breeding Ark, Java, Indonesia. Controlled conditions.
Cotton-top tamarins (Saguinus oedipus) curiously looking around, Safari North, Brainerd. This species is from Colombia. Critically endangered. Captive.
01739322
Joel Sartore / Photo Ark / Cotton-top tamarins (Saguinus oedipus) curiously looking around, Safari North, Brainerd. This species is from Colombia. Critically endangered. Captive.
Booted macaque (Macaca ochreata ochreata) pair. One animal is grooming the other before it stops and watches a fly. Safari North Wildlife Park, Brainerd, Minnesota. Captive.
01739321
Joel Sartore / Photo Ark / Booted macaque (Macaca ochreata ochreata) pair. One animal is grooming the other before it stops and watches a fly. Safari North Wildlife Park, Brainerd, Minnesota. Captive.
Sumatran slow loris (Nycticebus hilleri) male looking round at the camera, Taman Safari, Jawa Timur. Endangered. Captive.
01739320
Joel Sartore / Photo Ark / Sumatran slow loris (Nycticebus hilleri) male looking round at the camera, Taman Safari, Jawa Timur. Endangered. Captive.
Sumatran slow loris (Nycticebus hilleri) male looking at the camera, Taman Safari, Jawa Timur. Endangered. Captive.
01739319
Joel Sartore / Photo Ark / Sumatran slow loris (Nycticebus hilleri) male looking at the camera, Taman Safari, Jawa Timur. Endangered. Captive.
Red-backed bearded saki (Chiropotes chiropotes) female sitting and feeding, Omaha's Henry Doorly Zoo and Aquarium, Nebraska. Captive.
01739318
Joel Sartore / Photo Ark / Red-backed bearded saki (Chiropotes chiropotes) female sitting and feeding, Omaha's Henry Doorly Zoo and Aquarium, Nebraska. Captive.
Prince Demidoff's bushbaby (Galagoides demidovii) looking around and listening, Its ears twitch in response to the surrounding sound, Ueno Zoo, Tokyo. Captive.
01739317
Joel Sartore / Photo Ark / Prince Demidoff's bushbaby (Galagoides demidovii) looking around and listening, Its ears twitch in response to the surrounding sound, Ueno Zoo, Tokyo. Captive.
Red giant flying squirrel (Petaurista petaurista nigricaudata) looking round at the camera, Prigen Conservation Breeding Ark, Java, Indonesia. Controlled conditions.
01739316
Joel Sartore / Photo Ark / Red giant flying squirrel (Petaurista petaurista nigricaudata) looking round at the camera, Prigen Conservation Breeding Ark, Java, Indonesia. Controlled conditions.
Black-tailed marmoset (Mico melanurus) sitting and curiously looking around, Hemsley Conservation Center, Fairseat. Captive.
01739315
Joel Sartore / Photo Ark / Black-tailed marmoset (Mico melanurus) sitting and curiously looking around, Hemsley Conservation Center, Fairseat. Captive.
Humboldt penguin (Spheniscus humboldti) shaking its head and looking around. Lincoln Children's Zoo, Nebraska. Captive.
01739276
Joel Sartore / Photo Ark / Humboldt penguin (Spheniscus humboldti) shaking its head and looking around. Lincoln Children's Zoo, Nebraska. Captive.
Humboldt penguin (Spheniscus humboldti) walking forward and shaking, Lincoln Children's Zoo, Nebraska. Captive.
01739275
Joel Sartore / Photo Ark / Humboldt penguin (Spheniscus humboldti) walking forward and shaking, Lincoln Children's Zoo, Nebraska. Captive.
Violet-necked lory (Eos squamata obiensis) looking at the camera and vocalising, Anak Burung Tropikana, Bali. Captive.
01739274
Joel Sartore / Photo Ark / Violet-necked lory (Eos squamata obiensis) looking at the camera and vocalising, Anak Burung Tropikana, Bali. Captive.
Violet-necked lory (Eos squamata obiensis) looking at the camera and blinking, Anak Burung Tropikana, Bali. Captive.
01739273
Joel Sartore / Photo Ark / Violet-necked lory (Eos squamata obiensis) looking at the camera and blinking, Anak Burung Tropikana, Bali. Captive.
Triton cockatoo (Cacatua galerita triton) yawning / stretching its beak. Then the bird ruffles its feathers which raises its crest. Anak Burung Tropikana, Bali. Captive.
01739272
Joel Sartore / Photo Ark / Triton cockatoo (Cacatua galerita triton) yawning / stretching its beak. Then the bird ruffles its feathers which raises its crest. Anak Burung Tropikana, Bali. Captive.
Amazon parrot (Amazona sp.) yawning / stretching its beak, Vogelpark Turnersee,  St. Primus. Captive.
01739270
Joel Sartore / Photo Ark / Amazon parrot (Amazona sp.) yawning / stretching its beak, Vogelpark Turnersee, St. Primus. Captive.
Sulphur crested cockatoo (Cacatua sulphurea occidentalis) raising its crest and looking around, Prigen Conservation Breeding Ark, Java, indonesia. Critically endangered. Controlled conditions.
01739269
Joel Sartore / Photo Ark / Sulphur crested cockatoo (Cacatua sulphurea occidentalis) raising its crest and looking around, Prigen Conservation Breeding Ark, Java, indonesia. Critically endangered. Controlled conditions.
Plains viscacha (Lagostomus maximus) eating and looking around. Then the animal grooms itself. Zie-Zoo, Volkel. Captive.
01739314
Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating and looking around. Then the animal grooms itself. Zie-Zoo, Volkel. Captive.
Amazon parrot (Amazona sp.) looking around. Then the animal yawns / stretches its beak. Vogelpark Turnersee,  St. Primus. Captive.
01739268
Joel Sartore / Photo Ark / Amazon parrot (Amazona sp.) looking around. Then the animal yawns / stretches its beak. Vogelpark Turnersee, St. Primus. Captive.
Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.
01739313
Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.
Brazilian porcupine (Coendou prehensilis) eating while upright on hind legs, Lincoln Children's Zoo, Nebraska. Captive.
01739312
Joel Sartore / Photo Ark / Brazilian porcupine (Coendou prehensilis) eating while upright on hind legs, Lincoln Children's Zoo, Nebraska. Captive.
Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.
01739311
Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.
Plains viscacha (Lagostomus maximus) eating. Then the animal stops and sniffs the air. Zie-Zoo, Volkel. Captive.
01739310
Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating. Then the animal stops and sniffs the air. Zie-Zoo, Volkel. Captive.
Grevy's zebras (Equus grevyi) walking and looking around, Safari North, Brainerd. This species is from Kenya and Ethiopia. Endangered. Captive.
01739309
Joel Sartore / Photo Ark / Grevy's zebras (Equus grevyi) walking and looking around, Safari North, Brainerd. This species is from Kenya and Ethiopia. Endangered. Captive.
Grevy's zebras (Equus grevyi) looking at the camera, one animal nuzzles the other before it walks off, Safari North, Brainerd. This species is from Kenya and Ethiopia. Endangered. Captive.
01739308
Joel Sartore / Photo Ark / Grevy's zebras (Equus grevyi) looking at the camera, one animal nuzzles the other before it walks off, Safari North, Brainerd. This species is from Kenya and Ethiopia. Endangered. Captive.
East African oryxs (Oryx beisa) raising their heads and looking at the camera, Safari North, Brainerd. This species is from East Africa. Endangered. Captive.
01739307
Joel Sartore / Photo Ark / East African oryxs (Oryx beisa) raising their heads and looking at the camera, Safari North, Brainerd. This species is from East Africa. Endangered. Captive.
Nubian soemmerring's gazelle (Nanger soemmerringii) male looking around. A fly is irritating the Gazelle, causing it to move its head erratically. Al Bustan Zoological Centre, Sharjah. Captive.
01739306
Joel Sartore / Photo Ark / Nubian soemmerring's gazelle (Nanger soemmerringii) male looking around. A fly is irritating the Gazelle, causing it to move its head erratically. Al Bustan Zoological Centre, Sharjah. Captive.
Stone's sheep (Ovis dalli stonei) male looking at the camera and licking its mouth. Then the animal leaves the frame. Assiniboine Park Zoo, Winnipeg. Captive.
01739305
Joel Sartore / Photo Ark / Stone's sheep (Ovis dalli stonei) male looking at the camera and licking its mouth. Then the animal leaves the frame. Assiniboine Park Zoo, Winnipeg. Captive.
Tracking shot of an American dog tick (Dermacentor variabilis) female, Lincoln, Nebraska, USA. Controlled conditions.
01739304
Joel Sartore / Photo Ark / Tracking shot of an American dog tick (Dermacentor variabilis) female, Lincoln, Nebraska, USA. Controlled conditions.
African pompano (Alectis ciliaris) juvenile swimming, Blue Corner, Shizuoka. Captive.
01739303
Joel Sartore / Photo Ark / African pompano (Alectis ciliaris) juvenile swimming, Blue Corner, Shizuoka. Captive.
Bartram's scrub-hairstreak (Strymon acis bartrami) moving its antennae, Pine Rocklands, Florida, USA. Controlled conditions.
01739302
Joel Sartore / Photo Ark / Bartram's scrub-hairstreak (Strymon acis bartrami) moving its antennae, Pine Rocklands, Florida, USA. Controlled conditions.
Gray's leaf insects (Pulchriphyllium bioculatum) moving their legs, Taman Mini, Jakarta. Captive.
01739301
Joel Sartore / Photo Ark / Gray's leaf insects (Pulchriphyllium bioculatum) moving their legs, Taman Mini, Jakarta. Captive.
Glass knifefish (Eigenmannia virescens) swimming into frame, Fin-Tastic Fish, Nebraska. Captive.
01739300
Joel Sartore / Photo Ark / Glass knifefish (Eigenmannia virescens) swimming into frame, Fin-Tastic Fish, Nebraska. Captive.
Northern tidewater goby (Eucyclogobius newberryi) female looking around, Vandenberg Space Force Base, California, USA. Controlled conditions.
01739299
Joel Sartore / Photo Ark / Northern tidewater goby (Eucyclogobius newberryi) female looking around, Vandenberg Space Force Base, California, USA. Controlled conditions.
Banded allotoca (Allotoca goslinei) pair swimming, one animal leaves the frame, private collection, Vienna. Extinct from wild. Captive.
01739298
Joel Sartore / Photo Ark / Banded allotoca (Allotoca goslinei) pair swimming, one animal leaves the frame, private collection, Vienna. Extinct from wild. Captive.
Northern tidewater goby (Eucyclogobius newberryi) females looking and moving gills, Vandenberg Space Force Base, California, USA. Controlled conditions.
01739297
Joel Sartore / Photo Ark / Northern tidewater goby (Eucyclogobius newberryi) females looking and moving gills, Vandenberg Space Force Base, California, USA. Controlled conditions.
Northern carmine bee-eater (Merops nubicus) looking around and vocalising, Plzen Zoo. Captive.
01739296
Joel Sartore / Photo Ark / Northern carmine bee-eater (Merops nubicus) looking around and vocalising, Plzen Zoo. Captive.
Northern carmine bee-eater (Merops nubicus) looking around and vocalising, Plzen Zoo. Captive.
01739295
Joel Sartore / Photo Ark / Northern carmine bee-eater (Merops nubicus) looking around and vocalising, Plzen Zoo. Captive.
White-bellied go-away-bird (Corythaixoides leucogaster) juvenile looking round at the camera and vocalising, San Diego Zoo, California. Captive.
01739294
Joel Sartore / Photo Ark / White-bellied go-away-bird (Corythaixoides leucogaster) juvenile looking round at the camera and vocalising, San Diego Zoo, California. Captive.
Black-and-white-casqued hornbill (Bycanistes subcylindricus subquadratus) female looking around with its beak open, Vogelpark Turnersee, St. Primus. Captive.
01739293
Joel Sartore / Photo Ark / Black-and-white-casqued hornbill (Bycanistes subcylindricus subquadratus) female looking around with its beak open, Vogelpark Turnersee, St. Primus. Captive.
Indochinese green peafowl (Pavo muticus imperator) female looking around, Angkor Centre for Conservation of Biodiversity, Siem Reap, Cambodia. Endangered. Controlled conditions.
01739292
Joel Sartore / Photo Ark / Indochinese green peafowl (Pavo muticus imperator) female looking around, Angkor Centre for Conservation of Biodiversity, Siem Reap, Cambodia. Endangered. Controlled conditions.
East Siberian eagle-owl (Bubo bubo yenisseensis) female looking round at the camera, Cotsworld Falconry Center, Batsford. Captive.
01739291
Joel Sartore / Photo Ark / East Siberian eagle-owl (Bubo bubo yenisseensis) female looking round at the camera, Cotsworld Falconry Center, Batsford. Captive.
Tenggara hill mynas (Gracula venerata) looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Endangered. Controlled conditions.
01739290
Joel Sartore / Photo Ark / Tenggara hill mynas (Gracula venerata) looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Endangered. Controlled conditions.
Javan pied myna (Gracupica jalla) looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
01739289
Joel Sartore / Photo Ark / Javan pied myna (Gracupica jalla) looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
01741834
Staffan Widstrand / Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
01741833
Staffan Widstrand / Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
01741832
Staffan Widstrand / Giant panda (Ailuropoda melanoleuc) female, walking over snow, Giant Panda National Park, Sichuan, China. March, 2024.
Tenggara hill myna (Gracula venerata) vocalising. In the background, another Myna is looking. Prigen Conservation Breeding Ark, Java, Indonesia. Endangered. Controlled conditions.
01739288
Joel Sartore / Photo Ark / Tenggara hill myna (Gracula venerata) vocalising. In the background, another Myna is looking. Prigen Conservation Breeding Ark, Java, Indonesia. Endangered. Controlled conditions.
Nias hill myna (Gracula robusta) looking around with its beak open, before hopping forward, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
01739287
Joel Sartore / Photo Ark / Nias hill myna (Gracula robusta) looking around with its beak open, before hopping forward, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
Javan blue flycatcher (Cyornis banyumas) male looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
01739286
Joel Sartore / Photo Ark / Javan blue flycatcher (Cyornis banyumas) male looking around, Prigen Conservation Breeding Ark, Java, Indonesia. Critically endangered. Controlled conditions.
King bird-of-paradise (Cicinnurus regius) male looking around and vocalising. Then the animal ruffles its feathers. Walsrode Bird Park, Walsrode. Captive.
01739285
Joel Sartore / Photo Ark / King bird-of-paradise (Cicinnurus regius) male looking around and vocalising. Then the animal ruffles its feathers. Walsrode Bird Park, Walsrode. Captive.
San Clemente loggerhead shrike (Lanius ludovicianus mearnsi) female looking around and vocalising, Stone Station, San Clemente Island, California, USA. Controlled conditions.
01739284
Joel Sartore / Photo Ark / San Clemente loggerhead shrike (Lanius ludovicianus mearnsi) female looking around and vocalising, Stone Station, San Clemente Island, California, USA. Controlled conditions.
San Clemente loggerhead shrike (Lanius ludovicianus mearnsi) female looking around, Stone Station, San Clemente Island, California, USA. Controlled conditions.
01739283
Joel Sartore / Photo Ark / San Clemente loggerhead shrike (Lanius ludovicianus mearnsi) female looking around, Stone Station, San Clemente Island, California, USA. Controlled conditions.
Long-tailed glossy starling (Lamprotornis caudatus) looking around, private collection, Ras Al Khaimah. Captive.
01739282
Joel Sartore / Photo Ark / Long-tailed glossy starling (Lamprotornis caudatus) looking around, private collection, Ras Al Khaimah. Captive.
Swallow tanager (Tersina viridis) male looking around before flying out of the frame, Walsrode Bird Park. Captive.
01739281
Joel Sartore / Photo Ark / Swallow tanager (Tersina viridis) male looking around before flying out of the frame, Walsrode Bird Park. Captive.
Eurasian blue tit (Cyanistes caeruleus) juveniles calling, Cheshire Animals, Churton, UK. Controlled conditions.
01739280
Joel Sartore / Photo Ark / Eurasian blue tit (Cyanistes caeruleus) juveniles calling, Cheshire Animals, Churton, UK. Controlled conditions.
Oriental honey-buzzard (Pernis ptilorhynchus orientalis) looking around and blinking, Bali Bird Park, Bali. Captive.
01739279
Joel Sartore / Photo Ark / Oriental honey-buzzard (Pernis ptilorhynchus orientalis) looking around and blinking, Bali Bird Park, Bali. Captive.
Ruff (Calidris pugnax) female walking forward and looking around. Then the animal ruffles its feathers. Lundi Farm, Verl. Captive.
01739278
Joel Sartore / Photo Ark / Ruff (Calidris pugnax) female walking forward and looking around. Then the animal ruffles its feathers. Lundi Farm, Verl. Captive.
Ruff (Calidris pugnax) female walking and looking around curiously, Lundi Farm, Verl. Captive.
01739277
Joel Sartore / Photo Ark / Ruff (Calidris pugnax) female walking and looking around curiously, Lundi Farm, Verl. Captive.
White-spotted cochran frog (Sachatamia albomaculata) pair in amplexus whilst sitting on leaf, Panama.
01740106
Emanuele Biggi / White-spotted cochran frog (Sachatamia albomaculata) pair in amplexus whilst sitting on leaf, Panama.
Malaysian horned frog (Pelobatrachus nasutus) looking forward, Kubah National Park, Sarawak, Borneo.
01740104
Emanuele Biggi / Malaysian horned frog (Pelobatrachus nasutus) looking forward, Kubah National Park, Sarawak, Borneo.
Panther flying frog (Rhacophorus pardalis)  female depositing eggs in nest made of protein rich mucus hanging from leaf, Kubah National Park, Sarawak, Borneo.
01740102
Emanuele Biggi / Panther flying frog (Rhacophorus pardalis) female depositing eggs in nest made of protein rich mucus hanging from leaf, Kubah National Park, Sarawak, Borneo.
Panther flying frog (Rhacophorus pardalis) females depositing eggs in nest made of protein rich mucus hanging from leaf, Kubah National Park, Sarawak, Borneo.
01740101
Emanuele Biggi / Panther flying frog (Rhacophorus pardalis) females depositing eggs in nest made of protein rich mucus hanging from leaf, Kubah National Park, Sarawak, Borneo.
Gardiner's frog (Sechellophryne gardineri) climbing through moss, Mah Island, Seychelles.
01740095
Emanuele Biggi / Gardiner's frog (Sechellophryne gardineri) climbing through moss, Mah Island, Seychelles.
Oita salamander (Hynobius dunni) egg mass with developing embryos attached to stick. Captive.
01739886
Emanuele Biggi / Oita salamander (Hynobius dunni) egg mass with developing embryos attached to stick. Captive.
Mountain hare (Lepus timidus) in winter coat, head portrait, Monadhliath mountains, Scotland, UK. January.
01740059
Andrew Parkinson / Mountain hare (Lepus timidus) in winter coat, head portrait, Monadhliath mountains, Scotland, UK. January.
Philippine cylindrical snake (Hologerrhum philippinum) portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
01740458
Joel Sartore / Photo Ark / Philippine cylindrical snake (Hologerrhum philippinum) portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
Philippine cylindrical snake (Hologerrhum philippinum) portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
01740457
Joel Sartore / Photo Ark / Philippine cylindrical snake (Hologerrhum philippinum) portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
Philippine cylindrical snake (Hologerrhum philippinum) head portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
01740456
Joel Sartore / Photo Ark / Philippine cylindrical snake (Hologerrhum philippinum) head portrait, UPLB Museum of Natural History, Los Banos, Philippines. Captive.
Javan yellow-throated marten (Martes flavigula robinsoni) portrait, Nashville Zoo. Captive, occurs in Java.
01737377
Joel Sartore / Photo Ark / Javan yellow-throated marten (Martes flavigula robinsoni) portrait, Nashville Zoo. Captive, occurs in Java.
Javan yellow-throated marten (Martes flavigula robinsoni) portrait, Nashville Zoo. Captive, occurs in Java.
01737376
Joel Sartore / Photo Ark / Javan yellow-throated marten (Martes flavigula robinsoni) portrait, Nashville Zoo. Captive, occurs in Java.
Spotted hyena (Crocuta crocuta) head portrait, Emirates Park Zoo, UAE. Captive, occurs in Africa.
01737375
Joel Sartore / Photo Ark / Spotted hyena (Crocuta crocuta) head portrait, Emirates Park Zoo, UAE. Captive, occurs in Africa.
Arabian striped hyena (Hyaena hyaena sultana) portrait, Al Wathba Breeding Center, Abu Dhabi, UAE. Captive.
01737374
Joel Sartore / Photo Ark / Arabian striped hyena (Hyaena hyaena sultana) portrait, Al Wathba Breeding Center, Abu Dhabi, UAE. Captive.
Arabian striped hyena (Hyaena hyaena sultana) portrait, Al Wathba Breeding Center, Abu Dhabi, UAE. Captive.
01737373
Joel Sartore / Photo Ark / Arabian striped hyena (Hyaena hyaena sultana) portrait, Al Wathba Breeding Center, Abu Dhabi, UAE. Captive.
Tayra (Eira barbara poliocephala) head portrait, Alexandria Zoological Park, Louisiana. Captive, occurs in South America.
01737372
Joel Sartore / Photo Ark / Tayra (Eira barbara poliocephala) head portrait, Alexandria Zoological Park, Louisiana. Captive, occurs in South America.
Tayra (Eira barbara poliocephala) portrait, Alexandria Zoological Park, Louisiana. Captive, occurs in South America.
01737371
Joel Sartore / Photo Ark / Tayra (Eira barbara poliocephala) portrait, Alexandria Zoological Park, Louisiana. Captive, occurs in South America.
American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.
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Joel Sartore / Photo Ark / American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.
American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.
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Joel Sartore / Photo Ark / American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.
Short-eared dog (Atelocynus microtis) female, aged 12 years, with mouth open head portrait, Taricaya Eco Reserve, Puerto Maldonado, Peru. Captive.
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Joel Sartore / Photo Ark / Short-eared dog (Atelocynus microtis) female, aged 12 years, with mouth open head portrait, Taricaya Eco Reserve, Puerto Maldonado, Peru. Captive.
American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.
01737367
Joel Sartore / Photo Ark / American mink (Neovison vison evagor) portrait, Portland Audubon Wildlife Care Center, Oregon, USA. Captive.