Loic Poidevin / Iberian lynx (Lynx pardinus) wearing radio collar, walking over grassland, Spain. November. Endangered.

Loic Poidevin / Banded mongoose (Mungos mungo) walking over grass, Uganda.

Doug Wechsler / Tree swallow (Tachycineta bicolor) migratory flock descending to feed on Bayberries (Myrica pensylvanica), Cape May, New Jersey, USA. October.

Doug Wechsler / Tree swallow (Tachycineta bicolor) flock descending to feed on Bayberries (Myrica pensylvanica) during southward migration, Cape May, New Jersey, USA. October.

Doug Wechsler / European woolcarder bee (Anthidium manicatum) in flight, Morris Arboretum, Pennsylvania, USA. June.

Philippe Clement / Sand cat (Felis margarita) walking over sandy ground. Captive, occurs in North Africa, the Arabian Peninsula, Pakistan and the Middle East.

Fernando Faciole / Southern tamandua (Tamandua tetradactyla) walking through Pantanal wetlands. Transpantaneira Highway, Pocone, Mato Grosso, Brazil.

Fernando Faciole / Crab-eating fox (Cerdocyon thous) walking through Pantanal wetlands. Transpantaneira Highway, Pocone, Mato Grosso, Brazil.

Fernando Faciole / Jaguar (Panthera onca) walking through Pantanal wetlands. Encontro das Aguas State Park, Mato Grosso, Brazil.

Fernando Faciole / Jaguar (Panthera onca) walking through Pantanal wetlands. Encontro das Aguas State Park, Mato Grosso, Brazil.

Fernando Faciole / Two wild Reindeer (Rangifer tarandus) crossing windswept valley in autumn. North Iceland. October.

Fernando Faciole / Three wild Reindeer (Rangifer tarandus) crossing windswept valley in autumn. North Iceland. October.

Fernando Faciole / Three wild Reindeer (Rangifer tarandus) crossing windswept valley in autumn. North Iceland. October.

Fernando Faciole / Collins' squirrel monkey (Saimiri collinsii) jumping from tree branch to vine. Jari Channel, Para, Brazil.

Kristel Richard / Dhole (Cuon alpinus) walking, Pench National Park, Madya Pradesh, India. Endangered.

Kristel Richard / Golden jackal (Canis aureus) jumping over tall vegetation, Pench National Park, Madya Pradesh, India.

Kristel Richard / Golden jackal (Canis aureus) running through tall vegetation, Pench National Park, Madya Pradesh, India.

Kristel Richard / Two pompilho (Portuguese cowboys), riding Lusitano horses and demonstrating skills with garrochas, Feira da Golega, Ribatejo, Portugal. Garrochas are long poles used to move cows.

Roger Powell / Willow ptarmigan (Lagopus lagopus) male, in spring plumage walking through snow, Pokka, Finnish Lapland. May.

Roger Powell / Western capercaillie (Tetrao urogallus) female, walking through snow, Pokka, Finnish Lapland. May.

Gabriel Rojo / South American sea lion (Otaria flavescens) , female and pup walking on beach at low tide, Punta Norte Nature Reserve, Peninsula Valdes, Patagonia, Argentina.

Gabriel Rojo / Hog nosed skunk (Conepatus chinga) juvenile, walking along tree branch, La Pampa province, Patagonia, Argentina.

Gabriel Rojo / Elegant crested tinamou (Eudromia elegans) walking through grassland, La Pampa province, Patagonia, Argentina.

Gabriel Rojo / Wild boar (Sus scrofa) piglet, walking over grass, La Pampa province, Patagonia, Argentina. Captive.

Gabriel Rojo / Blackbuck antelopes (Antilope cervicapra) pair running through grassland, an introduced species, La Pampa province, Patagonia, Argentina.

Gabriel Rojo / Blackbuck antelope (Antilope cervicapra) male, leaping through grassland, an introduced species, La Pampa province, Patagonia, Argentina.

Gabriel Rojo / Red deer (Cervus elaphus) stag, an introduced species, standing in grassland with three Water buffalos (Bubalus bubalis) passing by in background, La Pampa, Patagonia, Argentina.

Ripan Biswas / Bengal tiger (Panthera tigris tigris) strolling among mangrove jungle, Sunderban tiger reserve, West Bengal, India. Endangered.

Ripan Biswas / Jungle cat (Felis chaus) walking though mangroves, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Spotted deer (Axix axis) walking through long grass, Sunderban tiger reserve, West Bengal, India.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) hatchlings moving across beach towards sea after leaving nest, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) hatchlings moving across beach towards sea after emerging from nest, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) hatchlings moving across beach towards sea after emerging from nest, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) hatchlings making their way across beach towards the sea at dusk, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean Sea.

Tui De Roy / Two Leatherback turtle (Dermochelys coriacea) hatchlings moving across beach towards sea after leaving nest, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean Sea.

Tui De Roy / Two Leatherback turtle (Dermochelys coriacea) hatchlings moving across beach towards sea after leaving nest, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean Sea.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) female, moving up beach through water channel to reach nesting site, with two Black vultures (Coragyps atratus) perched on her shell and rest of flock congreg...

Tui De Roy / Leatherback turtle (Dermochelys coriacea) female, moving through river channel on beach trying to return to sea after laying eggs, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) females, coming ashore under moonlight to nest on beach, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) females, coming ashore under moonlight to nest on beach, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) female, moving across beach, returning to sea after laying eggs, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Tui De Roy / Leatherback turtle (Dermochelys coriacea) female, moving through river channel on beach trying to return to sea after laying eggs, Grande Riviere, Trinidad Island, Trinidad & Tobago, Caribbean.

Roland Seitre / Egyptian plover (Pluvianus aegyptius) walking, portrait, Niokolo Koba National Park, Senegal.

Roland Seitre / Egyptian plover (Pluvianus aegyptius) walking on stony ground, Niokolo Koba National Park, Senegal.

Roland Seitre / Red-necked avocets (Recurvirostra novaehollandiae) walking along water's edge, Bedourie, Queensland, Australia.

Tom Vierus / Chatham Island giant tortoise / San Cristobal giant tortoise (Chelonoidis niger chathamensis) looking around. The animal opens its mouth. Galapagos Islands, Ecuador. Endangered.

Tom Vierus / Pink-billed parrotfinch (Erythrura kleinschmidti) enters frame and lands on a branch. The bird looks around and then enters its nest. The nest has been built on an invasive African tulip tree (Spathod...

Tom Vierus / Pacific reef Heron (Egretta sacra) resting in a Mangrove tree (Rhizophora sp). The animal stretches its wing and leg. Suva, Viti Levu, Fiji.

Tom Vierus / Galapagos sea lion (Zalophus wollebaeki) lying on a rock and basking in the sun. The sea lion uses the rock to scratch an itch on its neck. The animal is trying to rest but it is being disturbed by fl...

Tom Vierus / Fiji goshawk (Accipiter rufitorques) perched in a tree and calling. This species is endemic to Fiji. Suva, Viti Levu, Fiji.

Tom Vierus / Acropora (Acropora sp.) hard coral spawning into the water during the night. This once-a-year event is influenced by several factors: temperature, day length, possible chemical cues and the lunar cycl...

Tom Vierus / Yellow-lipped sea krait / Banded sea krait / Colubrine sea krait (Laticauda colubrina) returning to the South Pacific Ocean. The animal enters the frame and then slithers across the sand. Leleluvia Is...

Tom Vierus / Asian magpie moth (Nyctemera baulus) feeding on a flowering plant, Conservation protected area, Sovi Basin, Viti Levu, Fiji.

Stefan Christmann (video) / Broken pieces of sea ice floating out of the bay in front of the ice shelf, Atka Bay, Antarctica. Timelapse created from stacked stills.

Stefan Christmann (video) / Emperor penguins (Aptenodytes forsteri) crossing a tidal crack in freshly formed sea ice. Timelapse created from stacked stills.

Stefan Christmann (video) / Thin layer of fresh sea ice moved up and down by the swell, with fog and clouds going through the frame, concealing and revealing a tabular iceberg, Atka Bay, Antarctica. Timelapse created from stacke...

Stefan Christmann (video) / Broken pieces of sea ice floating out of the bay in front of the ice shelf, Atka Bay, Antarctica. Timelapse created from stacked stills.

Stefan Christmann (video) / Broken sea ice floes floating in and out of Atka Bay, Antarctica. Timelapse created from stacked stills.

Stefan Christmann (video) / Fragile patches of fresh sea ice flakes floating on deep blue water, Atka Bay, Antarctica.

Stefan Christmann (video) / Pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Tilting shot of Ice shelf and pancake ice floes colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Panning shot of Pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Panning shot of Pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Panning shot of Ice shelf and pancake ice floes colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Panning shot of pancake ice floes slowly colliding with each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Fresh sheets of sea ice moving on top of each other, Atka Bay, Antarctica.

Stefan Christmann (video) / Fresh sheets of sea ice moving on top of each other, Atka Bay, Antarctica.

Ashley Cooper / Eurasian wren (Troglodytes troglodytes) perched and singing, garden, Ambleside, Lake District, UK.

Ashley Cooper / European goldfinch (Carduelis carduelis) perched in a tree and singing, Ambleside, Lake District, UK.

Ashley Cooper / Goldcrest (Regulus regulus) perched and singing. The bird leaves the frame. Ambleside, Lake District, UK.

Ashley Cooper / Goldcrest (Regulus regulus) perched and singing, Ambleside, Lake District, UK.

Ashley Cooper / Common chaffinch (Fringilla coelebs) male perched in a tree and calling, garden, Ambleside, Lake District, UK.

Ashley Cooper / Sedge warbler (Acrocephalus schoenobaenus) perched and singing, RSPB Leighton Moss, Lancashire, UK.

Ashley Cooper / Blue tit (Cyanistes caeruleus) perched in a tree and calling, garden, Austwick, Yorkshire Dales, UK.

Ashley Cooper / Sedge warbler (Acrocephalus schoenobaenus) perched in a Willow tree (Salix sp) and singing, Ambleside, Lake District, UK.

Ashley Cooper / Blackcap (Sylvia atricapilla) male perched in a cherry tree (Prunus sp) and singing, garden, Ambleside, Lake District, UK.

Ashley Cooper / Blackcap (Sylvia atricapilla) male perched in a tree and singing, Ambleside, Lake District, UK.

Ashley Cooper / Red-throated diver (Gavia stellata) swimming and calling. The animal puts its head under the water to search for food. Small loch near Eshaness, Shetland, Scotland, UK.

Ashley Cooper / Common snipe (Gallinago gallinago) perched on a fence post and calling, Eshaness, Mainland Shetland, Scotland, UK.

Ashley Cooper / Great spotted woodpecker (Dendrocopos major) drumming on a tree, Anglesey, Wales, UK.

Ashley Cooper / Greenfinch (Carduelis chloris) male perched in a tree and singing, Beaumaris, Anglesey, Wales.

Franco Banfi / Aerial shot of Sperm whales (Physeter macrocephalus) socialising on the surface of the water. A person can be seen snorkelling near the group. Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Aerial shot of Sperm whales (Physeter macrocephalus) socialising on the surface of the water. A person can be seen snorkelling near the group. Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Aerial shot of Sperm whales (Physeter macrocephalus) socialising on the surface of the water, Dominica, Caribbean Sea, Atlantic Ocean.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile hanging off a branch. The animals looks round and then down. Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile moving across a branch, towards the tree trunk. The animal does this becuase it realises it is too heavy for the thin branch. Isla Bastimentos, Boca...

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile climbing up a tree, Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile holding onto a tree and resting. The animal then looks up. Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile holding onto a tree and resting, Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) in a tree. The animal is scratching iself. The sloth is covered with sloth moths (Cryptoses choloepi). Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) scratching its head. The sloth is covered with sloth moths (Cryptoses choloepi). Isla Bastimentos, Bocas Del Toro, Panama.

Natalie Clements / Brown-throated sloth (Bradypus variegatus) looking around and scratching iself. The animal is holding onto a branch. The sloth is covered with sloth moths (Cryptoses choloepi). Isla Bastimentos, Bocas...

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile climbing down a tree. The animal stops and looks around. The sloth is covered with sloth moths (Cryptoses choloepi). Isla Bastimentos, Bocas Del To...

Natalie Clements / Brown-throated sloth (Bradypus variegatus) juvenile climbing down a tree, Isla Bastimentos, Bocas Del Toro, Panama.