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An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

Mountain Gorillas in Bwindi Impenetrable Forest National Park, UNESCO World Heritage Site, Uganda, East Africa, Africa

An adult lioness (Panthera leo) with playful cub along the Luangwa River in South Luangwa National Park, Zambia, Africa

Adult hoary marmot (Marmota caligata), on the Skyline Trail, Mount Rainier National Park, Washington State, United States of America, North America

Roosevelt Elk at Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Curious Steller sea lions (Eumetopias jubatus), South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

A Leopard (Panthera pardus) eating a warthog in the Maasai Mara National Reserve, Kenya, East Africa, Africa

Sheep grazing and distant dry stone walls around Arncliffe Village in Littondale, The Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Hippos enjoying the water seen on a Safari in the Maasai Mara National Reserve, Kenya, East Africa, Africa

Lion (Panthera leo), Buffalo Springs National Reserve, Samburu National Park, Kenya, East Africa, Africa

Red-legged Seriema (Crested Seriema) (Cariama cristata) running over grass, Serra da Canastra National Park, Minas Gerais, Brazil, South America

Elk (Cervus canadensis) in Rocky Mountain National Park, Colorado, United States of America, North America

A Silverback mountain gorilla, a member of the Agasha family in the mountains of Volcanos National Park, Rwanda, Africa

Rocky mountain bighorn sheep (Ovis canadensis) lamb on a wintry mountain, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

Rocky mountain bighorn sheep (Ovis canadensis) lamb on a wintry mountain, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky mountain bighorn rams (ovis canadensis) during the rut (mating) season, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Arctic squirrel (Citellus parry), Denali National Park, Alaska, United States of America, North America

Elephant, Loxodonta africana, bull in close up at water in Addo Elephant National park, Eastern Cape, South Africa

Malachite kingfisher (Alcedo cristata), on reed in Kruger National Park, Mpumalanga, South Africa, Africa

Common hippos, Hippopotamus amphibius, two young males sparring, Kruger National Park, South Africa, Africa

African elephant (Loxodonta africana) new-born calf, Addo Elephant National Park, South Africa, Africa

Male saddle-billed stork (Ephippiorhynchus senegalensis) cleaning a fresh-caught fish, Masai Mara National Reserve, Kenya, East Africa, Africa

Juvenile Wattled Jacanas (Jacana jacana) walking on waterlilies leaves with open wings, Manu National Park, Peruvian Amazon, Peru, South America

White rhino (Ceratotherium simum), close up with eye, Hlane Royal National Park game reserve, Swaziland, Africa

Cape buffalo (African buffalo) (Syncerus caffer) with a cattle egret (Bubulcus ibis) on its back, Lake Nakuru National Park, Kenya, East Africa, Africa

A Clark's anemonefish (Amphiprion clarkii) snuggles into the tentacles of its host anemone in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A snowflake moray eel (Echidna nebulosa) pokes its head out of a hole in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A live sundial shell (Architectonica perspectiva) crawls across the seafloor in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

Detail of a mushroom coral (Fungia sp.) on a reef in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A stargazer fish (Uranoscopus sulphureus) camouflages itself in sand in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

Detail of the colorful dorsal fin of a scorpionfish (Scorpaenopsis sp.) in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A bigfin reef squid (Sepioteuthis lessoniana) hovers in nighttime waters off the coast of Komodo Island in Komodo National Park, Indonesia.

A predatory stonefish (Synanceia verrucosa) lies camouflaged in the sandy seafloor of Komodo National Park, Indonesia. This is the most venomous fish on Earth but uses its venom only for defensive purposes.

A colorful nudibranch, Hypselodoris tryoni, crawls across a sandy sea floor in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A beautiful nudibranch, Chromodoris coi, crawls across the seafloor in Komodo National Park, Indonesia.

A colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.

A barred-fin moray eel, Gymnothorax zonipectus, is found on a coral reef in Komodo National Park, Indonesia.

Detail of a reef-building coral colony, Favia sp., growing on a healthy reef in Komodo National Park, Indonesia.

Detail of a reef-building coral colony, Favia sp., growing on a healthy reef in Komodo National Park, Indonesia.

A black manta ray, Mobula alfredi, visits a cleaning station on a reef in Komodo National Park, Indonesia.

A female greater kudu (Tragelaphus strepsiceros) and springbok (Antidorcas marsupialis) drinking at a waterhole, Nxai Pan National Park, Botswana, Africa

Brown capuchin monkey (Cebus apella) (Sapajus apella) on tree, Tambopata National Reserve, Puerto Maldonado, Tambopata Province, Madre de Dios, Peru, South America

Brown capuchin monkey (Cebus apella) (Sapajus apella) on tree, Tambopata National Reserve, Puerto Maldonado, Tambopata Province, Madre de Dios, Peru, South America

African wild dogs (Lycaon pictus), feeding on a wildebeest calf kill in Serengeti National Park, Tanzania, East Africa, Africa

African elephant (Loxodonta africana) and springboks (Antidorcas marsupialis) at waterhole, Nxai Pan National Park, Botswana, Africa

Giraffes (Giraffa camelopardalis) at sunset at a waterhole, Nxai Pan National Park, Botswana, Africa

African elephant (Loxodonta africana) and giraffes (Giraffa camelopardalis) at sunset, Nxai Pan National Park, Botswana, Africa

Two African elephants (Loxodonta africana) drinking at a waterhole with two elephant carcasses that have died due to drought, Savuti, Chobe National Park, Botswana, Africa

White-backed vultures (Gyps africanus) and a Black-backed jackal (Canis mesomelas) feed on an African elephant (Loxodonta africana), Savuti, Chobe National Park, Botswana, Africa

White-backed vultures (Gyps africanus) and a skinny African elephant (Loxodonta africana) at waterhole, Savuti, Chobe National Park, Botswana, Africa

White-backed vultures (Gyps africanus) perching on a tree top, Savuti, Chobe National Park, Botswana, Africa

A male lion (Panthera leo) feeds on an African elephant (Loxodonta africana), Savuti, Chobe National Park, Botswana, Africa

Chimpanzee (Pan troglodytes), Gombe Stream National Park, Lake Tanganyika, Tanzania, East Africa, Africa

Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America

Southern pale chanting goshawk (Melierax canorus), Mountain Zebra National Park, South Africa, Africa

Herd of blue wildebeest (brindled gnu) (Connochaetes taurinus) and common zebras (Burchell's zebra) (Equus burchelli) drinking at Mara River, Masai Mara National Reserve, Kenya, East Africa, Africa

African wild dogs (Lycaon pictus), feeding on a wildebeest calf kill in Serengeti National Park, Tanzania, East Africa, Africa

Sulphur-crested Cockatoo (Cacatua galerita), Dandenong Ranges National Park, Dandenong Ranges, Victoria, Australia, Pacific

Elk (Cervus canadensis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Boa, Acrantophis madagascariensis, Strict Nature Reserve of Lokobe, National Park, Nosy Be island, Republic of Madagascar, Indian Ocean

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America

Northern (Steller) sea lions (Eumetopias jubatus) hauled out on South Marble Island in Glacier Bay National Park, Alaska, United States of America

Adult tufted puffin (Fratercula cirrhata) on the water at South Marble Island, Glacier Bay National Park, Alaska, United States of America

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America