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.

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...

Roger Powell / Purple heron (Ardea purpurea) walking past a net over a fishpond, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / White-breasted kingfisher (Halcyon smyrnensis) with ring, calling in reed bed beside stream, after bathing, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / White-breasted kingfisher (Halcyon smyrnensis) calling in reed bed beside stream, after bathing, K'Far Ruppin kibbutz, 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) 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 / Pied kingfisher (Ceryle rudis) male landing on favoured fishing post, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Pied kingfisher (Ceryle rudis) male landing on favoured fishing post with tadpole, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Pied kingfisher (Ceryle rudis) male landing on favoured fishing post, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Pied kingfisher (Ceryle rudis) male flying up to favoured fishing post with tadpole in its beak, 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 / Grey heron (Ardea cinerea) perched on top of a fishpond net, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Grey heron (Ardea cinerea) in flight, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Eurasian spoonbills (Platalea leucorodia) standing in a fishpond and preening, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / White-breasted kingfisher (Halcyon smyrnensis) in reedbed beside a steam after bathing, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

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

Roger Powell / Spur-winged lapwing (Vanellus spinosus) standing on an irrigation pipe in its breeding territory, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Spur-winged lapwing (Vanellus spinosus) standing on an irrigation pipe in its breeding territory, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Pied avocets (Recurvirostra avosetta) in migratory flock, sleeping, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Lesser spotted eagle (Clanga pomarina) resting on migration in tree, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Eurasian jay (Garrulus glandarius atricapillus) perched on date palm branch with a caterpillar in its beak, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Eurasian jay (Garrulus glandarius atricapillus) perched beside its nest on a date palm, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Common snipe (Gallinago gallinago) pair, male courting female with its tail feathers displayed, K'Far Ruppin kibbutz fishpond, Jordan Valley, Israel, March.

Roger Powell / Common myna (Acridotheres tristis) perched on fence, K'Far Ruppin kibbutz, Beit She'an, Jordan Valley, Israel, March.

Roger Powell / Clamorous reed warbler (Acrocephalus stentoreus) singing in a reed bed whilst perched on a stick, K'Far Ruppin kibbutz fishponds, Jordan Valley, Israel, March.

Roger Powell / Hooded crow (Corvus corone cornix) searching for nesting material in field, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

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

Roger Powell / Wood sandpiper (Tringa glareola) standing near fishpond, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Western marsh harrier (Circus aeruginosus) female perched in a tamarisk shrub, resting whilst on migration, K'Far Ruppin kibbutz, Jordan Valley, Israel, March.

Roger Powell / Western marsh harrier (Circus aeruginosus) sub-adult perched in a tree whilst resting on migration, K'Far Ruppin kibbutz, Jordan Valley, Israel.

Roger Powell / Great white pelicans (Pelecanus onocrotalus) in flock using thermals to fly north on migration, Jordan Valley, Israel, March.

Roger Powell / Great white pelican (Pelecanus onocrotalus) flying north on migration, Jordan Valley, Israel, March.

Roger Powell / Golden jackal (Canis aureus) pack pausing briefly on a kibbutz track whilst hunting, 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 / Chukar (Alectoris chukar) male and female pair feeding on the edge of farmland, K'Far Ruppin, Jordan Valley, Israel, March.

Roger Powell / Osprey (Pandion haliaetus) female landing on a fishpond gantry with a fish in its talons, K'Far Ruppin, Jordan valley, Israel, March.

Roger Powell / Osprey (Pandion haliaetus) female perched on a fishpond gantry with a fish in its talons, K'Far Ruppin, Jordan valley, Israel, March.

Roger Powell / Osprey (Pandion haliaetus) female perched on a fishpond gantry, tearing off a piece of a fish held in its talons, K'Far Ruppin, Jordan valley, Israel, March.

Roger Powell / Great white pelicans (Pelecanus onocrotalus) taking off from flock in kibbutz fields, after resting on their migration north, K'Far Ruppin, Jordan Valley, Israel.

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

Roger Powell / Bait digger looking for Ragworm & Lugworms, next to a Herring Gull (Larus argentatus), Boulmer Beach, Northumberland, UK, January.

Roger Powell / Western European hedgehog (Erinaceus europaeus) walking along garden path in winter, a time when it should be hibernating, Longframlington, Northumberland, England, UK, January.

Roger Powell / Rock pipit (Anthus petrosus) hunting insects on seaweed at tideline on beach, Low Newton, Northumberland, England, UK, February.

Roger Powell / European robin (Erithacus rubecula) perched on branch, Leighton Moss RSPB Reserve, Lancashire, England, UK, January.

Roger Powell / Flock of European goldfinches (Carduelis carduelis) flying to and perching on a bare hawthorn bush, Druridge Bay, Northumberland, England, UK, January.

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

Shane Gross / Humpback whale (Megaptera novaeangliae) swimming just below the ocean 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 snorkelers, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) surfacing next to snorkelers, 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) creating bubble arc with fin after surfacing, Tubuai, French Polynesia, Pacific Ocean.

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

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

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

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

Shane Gross / Pacific trumpetfish (Aulostomus chinensis) juvenile swimming near the water surface in the open ocean, Tubuai, French Polynesia, Pacific Ocean.

Shane Gross / Humpback whale (Megaptera novaeangliae) creating bubble arc with fin at waters surface, Tubuai, French Polynesia, Pacific Ocean.

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

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

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

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

Shane Gross / Humpback whale (Megaptera novaeangliae) swimming below water surface with snorkeler in the background, Tubuai, French Polynesia, Pacific Ocean.

Jussi Murtosaari / Red-footed falcon (Falco vespertinus) juvenile flying, Finland, September.

Jussi Murtosaari / Blyth's reed warbler (Acrocephalus dumetorum) male singing whilst perched on a pine tree, Finland, June.

Jussi Murtosaari / Canada goose (Branta canadensis) hissing and spreading its wings, Finland, April.

Jussi Murtosaari / Great snipe (Gallinago media) with an earthworm in its beak, Finland, September.

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

Jussi Murtosaari / European hare (Lepus europaeus) running across snow, Finland, April.

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

Jussi Murtosaari / Whooper swan (Cygnus cygnus) female taking flight, Finland, March.

Jussi Murtosaari / Swallowtail (Papilio machaon) butterfly feeding from thistle flower with its proboscis whilst urinating, Finland, June.

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

Jussi Murtosaari / Grey heron (Ardea cinerea) wading through water with reeds, Finland, April.

Roland Seitre / Chinese giant salamander (Andrias davidianus) in a captive environment, Prague Zoo, Prague, Czech Republic.

Roland Seitre / Chinese giant salamander (Andrias davidianus) in a captive environment, Prague Zoo, Prague, Czech Republic.

Lynn M. Stone / Icelandic horse galloping in flowering Buttercup (Ranunculus sp.) meadow, southwest Iceland. June.

Lynn M. Stone / Whooper swan (Cygnus cygnus) on lake, southwest Iceland. June.