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Adult humpback whale (Megaptera novaeangliae), flukes-up dive at sunset in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

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

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

Mother and foal Dartmoor Ponies grazing on the moor, Dartmoor National Park, Devon, England, United Kingdom, Europe

Bison grazing along the Theodore Roosevelt National Park North Unit, North Dakota, United States of America, North America

Bison in the Theodore Roosevelt National Park South Unit, North Dakota, United States of America, North America

Rocky Mountain Bighorn Sheep Ram (Ovis canadensis), Jasper National Park, Alberta, Canadian Rockies, Canada, North America

Wild Elk (Wapiti) (Cervus canadensis) during the Autumn rut, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky Mountain Bighorn Sheep Ram (Ovis canadensis), Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky Mountain Bighorn Sheep Rams (Ovis canadensis), Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky Mountain Bighorn Sheep Rams (Ovis canadensis) head-butting, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky Mountain Bighorn Sheep Ram (Ovis canadensis), Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Rocky Mountain Bighorn Sheep Ram (Ovis canadensis), Jasper National Park, Alberta, Canadian Rockies, Canada, North America

Wild Elk (Wapiti) (Cervus canadensis) during the Autumn rut, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Wild Elk calf (Wapiti) (Cervus canadensis) hiding in willows during autumn, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Wild Elk (Wapiti) (Cervus canadensis) bugling during the autumn rut, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Wild Elk (Wapiti) (Cervus canadensis) bugling during the Autumn rut, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult red kangaroo (Macropus rufus), in Cape Range National Park, Western Australia, Australia, Pacific

Ostrich (Struthio camelus) female, Kgalagadi Transfrontier Park, Northern Cape, South Africa, Africa

African elephant on the Ewaso Ng'iro river flowing between Buffalo Springs National Reserve and Samburu National Park, Kenya, East Africa, Africa

African elephant, Ewaso Ng'iro river flowing through Shaba Game Reserve, Samburu National Park, Kenya, East Africa, Africa

Vervet monkeys (Chlorocebus pygerythrus), Mountain Zebra National Park, Eastern Cape, South Africa, Africa

Huge deer, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, 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

Spectral Tarsier (Tarsius tarsier) one of the smallest primates, now endangered, insect eating and nocturnal, Tangkoko National Park, Minahasa Highlands, North Sulawesi, Indonesia, Southeast Asia, Asia

The wildebeest (Connochaetes taurinus), a large antelope found over much of the Kafue National Park, Zambia, Africa

Sandstone that has been eroded into forms that resemble clam shells on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Cheetah (Acinonyx jubatus) walking towards viewer, Serengeti National Park, Tanzania, East Africa, Africa

An adult great blue heron (Ardea herodias), spears a fish in Shark Valley, Everglades National Park, Florida, United States of America, North America

American bison (Bison Bison) in the snow on a river bank, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Breeding herd of elephant (Loxodonta africana), Addo Elephant National Park, Eastern Cape, South Africa, Africa

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

Bull elk (Cervus canadensis) standing in a stream, Rocky Mountain National Park, Colorado, United States of America, North America

Elephant breeding herd (Loxodonta africana), Addo Elephant National Park, Eastern Cape, South Africa, Africa

Yellow mongoose (Cynictis penicillata), Kgalagadi Transfrontier Park,encompasing the former Kalahari Gemsbok National Park, South Africa, Africa

Red-billed oxpecker (Buphagus erythrorhynchus) on a female impala (Aepyceros melampus), Kruger National Park, South Africa, Africa

Stone Sheep (Ovis dalli stonei) ewe and lamb, Stone Mountain Provincial Park, British Columbia, Canada, North America

A broadclub cuttlefish (Sepia latimanus) lays eggs in a coral colony in Komodo National Park, Indonesia.

Beautiful soft coral colonies grow on a healthy coral reef in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

Coral polyps (Galaxea sp.) wait for plankton on a reef in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A rare roughsnout ghost pipefish (Solenostomus paegnius) hovers above the seafloor in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

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 a stony coral (Galaxea sp.) growing in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

Colony of tunicates grow on a reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

Detail of the texture on a mushroom coral (Fungia sp.) growing in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A banded sea snake (Laticauda colubrina) swims at the surface in Wakatobi National Park, Indonesia. This is one of the most venomous snakes in the world.

A hawksbill sea turtle (Eretmochelys imbricata) is found on a reef at night in Komodo National Park, Indonesia.

Colorful chocolate chip starfish (Protoreaster nodosus) cling to the seafloor of a seagrass meadow 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.

Colorful chocolate chip starfish lie scattered on the floor of a seagrass meadow 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 hawksbill sea turtle, Eretmochelys imbricata, lays on a beautiful reef 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 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 colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.