Day octopus (Octopus cyanea), Hawaii, United States of America, Pacific, North America

A hawksbill sea turtle (Eretmochelys imbricata), in a colorful overhang on a reef in the Koro Sea, Fiji, South Pacific, Pacific

The male oval squid (Sepioteuthis lessoniana), can reach 14 inches in length, Hawaii, United States of America, Pacific, North America

Day octopus (Octopus cyanea), in mid-water, Hawaii, United States of America, Pacific, North America

A guineafowl puffer (Arothron meleagris), Yap, Micronesia, Pacific

Scops owl (Otus) (Strigidae), Ranthambhore, Rajasthan, India, Asia

Hinge beak shrimp (Hinge beak prawn) (Rhynchocinetes sp.) emerges to feed at night, Matangi Island, Vanua Levu, Fiji, Pacific

Thornicroft's giraffe (Giraffa camelopardalis thornicrofti), South Luangwa National Park, Zambia, Africa

White-fronted bee-eater (Merops bullockoides), South Luangwa National Park, Zambia, Africa

Two wild horses sparring in the bleached landscape near Aus, Namibia, Africa

Resident killer whale, Orcinus orca, Cattle Pass, San Juan Island, Washington, United States of America, North America

Barn owl (Tyto alba), Herefordshire, England, United Kingdom, Europe

Ustaad, T24, Royal Bengal tiger (Tigris tigris) drinking, Ranthambhore, Rajasthan, India, Asia

Red-tailed tropicbird (Phaethon rubricauda), Kilauea Point National Wildlife Refuge, Kauai, Hawaii, United States of America, Pacific

Resident killer whale, Orcinus orca, Cattle Pass, San Juan Island, Washington, United States of America, North America

Resident killer whale bull, Orcinus orca, Cattle Pass, San Juan Island, Washington, United States of America, North America

Dusky anenomefish (Amphiprion melanomas) dominant female, lives in symbiotic association with its host anemone, Matangi Island, Vanua Levu, Fiji, Pacific

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Adult bull Atlantic walrus (Odobenus rosmarus rosmarus) on the beach in Torellneset, Nordauslandet, Svalbard, Norway, Scandinavia, Europe

Little owl (Athene noctua), Devon, England, United Kingdom, Europe

Adult bull Atlantic walrus (Odobenus rosmarus rosmarus) hauled out on ice in Storfjorden, Svalbard, Norway, Scandinavia, Europe

Grey reef sharks (Carcharhinus amblyrhynchos), at a controlled feeding of the island of Yap, Micronesia, Pacific

A nurse shark (Ginglymostoma cirratum) pictured with a school of juvenile jacks. Bahamas, Central America

A humpback whale (Megaptera novaeangliae), slaps the surface of the water with its tail, United States of America, Pacific, North America

Road sign, giant anteater (Myrmecophaga tridactyla), Transpantaneira road, Pantanal wetland, Brazil, South America

Hippopotamus (Hippopotamus amphibius), Kruger National Park, South Africa, Africa

African elephant (Loxodonta africana) group with baby, Addo Elephant National Park, South Africa, Africa

An adult King penguin (Aptenodytes patagonicus) feeding its chick, East Falkland, Falkland Islands, South America

Gentoo Penguins (Pygocelis papua papua) walking on the beach, Sea Lion Island, Falkland Islands, South America

Gentoo Penguins (Pygocelis papua papua) walking on the beach, Sea Lion Island, Falkland Islands, South America

A sea star shimp (Periclimenes soror), swims through a forest of spines on the back of a crown-of-thorns starfish, Micronesia, Pacific

Blacktip reef sharks (Carcharhinus melanopterus), Yap, Micronesia, Pacific

A humpback whale calf (Megaptera novaeangliae) heading to the surface, Hawaii, United States of America, Pacific, North America

Red fox (Vulpes vulpes), Devon, England, United Kingdom, Europe

Spotted deer (cheetal) (chital deer) (axis deer) (Axis axis), Ranthambhore, Rajasthan, India, Asia

Eurasian harvest mouse (Micromys minutus), Devon, England, United Kingdom, Europe

Leopard shark, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Crown of thorns starfish, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Large cuttle fish at the Aquarium, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Spotted eel at the Aquarium, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Free spotted eel, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Schooling yellowtails, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Leopard shark, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Adelie penguins (Pygoscelis adeliae), Dumont d'Urville, Antarctica, Polar Regions

Kangaroo Island grey kangaroos (Macropus fuliginosus), Lathami Conservation Park, Kangaroo Island, South Australia, Australia, Pacific

King penguin colony (Aptenodytes patagonicus), Macquarie Island, Sub-Antarctic, Polar Regions

Koala (Phascolarctos cinereus) in a eucalyptus tree, Yanchep National Park, West Australia, Australia, Pacific

King penguin colony (Aptenodytes patagonicus), Gold Harbour, South Georgia, Antarctic, Polar Regions

Kangaroo Island grey kangaroo (Macropus fuliginosus) with joey, Kelly Hill Conservation, Kangaroo Island, South Australia, Australia, Pacific

Kangaroo Island grey kangaroos (Macropus fuliginosus), Lathami Conservation Park, Kangaroo Island, South Australia, Australia, Pacific

Western gray kangaroo (Macropus fuliginosus) with joey in pouch, Yanchep National Park, West Australia, Australia, Pacific

Kangaroo Island grey kangaroo (Macropus fuliginosus), Flinders Chase National Park, Kangaroo Island, South Australia, Australia, Pacific

Kangaroo Island grey kangaroo (Macropus fuliginosus), Kelly Hill Conservation, Kangaroo Island, South Australia, Australia, Pacific

Juvenile mandrills (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

African forest elephant (Loxodonta cyclotis) bull standing at the edge of the forest, Loango National Park, Ogooue-Maritime, Gabon, Africa

King penguin and a chick (Aptenodytes patagonicus), Gold Harbour, South Georgia, Antarctic, Polar Regions

Kangaroo Island grey kangaroos (Macropus fuliginosus), Kelly Hill Conservation, Kangaroo Island, South Australia, Australia, Pacific

Koala (Phascolarctos cinereus) in a eucalyptus tree, Yanchep National Park, West Australia, Australia, Pacific

Kangaroo Island grey kangaroos (Macropus fuliginosus), Lathami Conservation Park, Kangaroo Island, South Australia, Australia, Pacific

Western gray kangaroo (Macropus fuliginosus) with joey in pouch, Yanchep National Park, West Australia, Australia, Pacific

Kangaroo Island grey kangaroos (Macropus fuliginosus), Lathami Conservation Park, Kangaroo Island, South Australia, Australia, Pacific

Rehabilitated orphaned chimpanzee (Pan troglodytes) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

African forest elephant (Loxodonta cyclotis) bull walking on the beach, Sette-Cama, near Loango National Park, Ogooue-Maritime, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Portrait of a male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Ducks walking in the snow, Caerphilly Castle, Caerphilly, Gwent, Wales, United Kingdom, Europe

Rehabilitated orphaned western lowland gorilla (Gorilla gorilla gorilla) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

African forest elephant (Loxodonta cyclotis) bull standing at the edge of the forest, Loango National Park, Ogooue-Maritime, Gabon, Africa

African forest buffalo (Syncerus caffer nanus) with yellow-billed oxpeckers (Buphagus africanus) clinging to its flanks, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Horse carriage for tourists, Zona Colonial (Colonial District), UNESCO World Heritage Site, Santo Domingo, Dominican Republic, West Indies, Caribbean, Central America

Kea (Nestor notabilis), Arthur's Pass, Canterbury high country, South Island, New Zealand, Pacific

Jackass penguin (Speniscus demersus) (African penguin), Boulders Beach, Cape Town, South Africa, Africa

Icelandic horses, near Skogar, South Iceland (Sudurland), Iceland, Polar Regions

A small acouti in the Iguassu National Park, Brazil, South America

Two swift fox (Vulpes velox) kits, Pawnee National Grassland, Colorado, United States of America, North America

Bald eagle in captivity, Hampshire, England, United Kingdom, Europe

Grey seal (Halichoerus grypus) on beach, Donna Nook, Lincolnshire, England, United Kingdom, Europe

Red deer (Cervus elaphus) stag portrait, Richmond Park, Surrey, England, United Kingdom, Europe

Stoat (Short-tailed weasel) (Mustela erminea), Mount Evans, Colorado, United States of America, North America

Icelandic horses, near Hofn, Hornafjordur mountains and glaciers behind, East Fjords region (Austurland), Iceland, Polar Regions

Mountain goat (Oreamnos americanus), Mount Evans, Colorado, United States of America, North America

Village scene with dogs, Kulusuk, East Coast, Greenland, Polar Regions

Red deer (Cervus elaphus) hinds, Richmond Park, Surrey, England, United Kingdom, Europe

Swift fox (Vulpes velox) vixen and kit, Pawnee National Grassland, Colorado, United States of America, North America

Puffin (Fratercula arctica) at Latrabjarg, largest bird colony in Europe, West Fjords (Vestfirdir), Iceland, Polar Regions

Highland cattle, Isle of Mull, Inner Hebrides, Scotland, United Kingdom, Europe

Pallas cat (Otocolobus manul) close-up, controlled conditions, Kent, England, United Kingdom, Europe

Grey wolf, Indiana, United States of America, North America

Icelandic horses, near Skogar, South Iceland (Sudurland), Iceland, Polar Regions

Grey seal (Halichoerus grypus) pup, Donna Nook, Lincolnshire, England, United Kingdom, Europe

Grey seal (Halichoerus grypus) bull, Donna Nook, Lincolnshire, England, United Kingdom, Europe

Grey wolf, near Layfayette, Indiana, United States of America, North America

Four barn swallow (Hirundo rustica) chicks chirping, Custer State Park, South Dakota, United States of America, North America

Tenebrionid beetle (Onymacris unguicularis), Namib desert, Sossusvlei, Nabib-Naukluft Park, Namibia, Africa

A Nile crocodile (Crocodylus niloticus) resting with open mouth at the water's edge, Kwai river, Moremi Wildlife reserve, Okavango Delta, Botswana, Africa

Birds in reedbeds, Okavango River, Botswana, Africa

Red Titi monkey (Callicebus cupreus) on branch, controlled conditions, United Kingdom, Europe