Steven David Miller / Freshwater pools on Waterfall Creek, at the top of Gunlom Falls. Mary River, Kakadu National Park, Northern Territory, Australia. March 2014.
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Mary McDonald / Snowy egret (Egretta thula) flying over river, Everglades National Park, Florida, USA, December.
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Mary McDonald / Elk (Cervus elaphus) males fighting, Yellowstone National Park, Wyoming, USA, September.
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Mary McDonald / Elk (Cervus elaphus) males fighting in stream, Yellowstone National Park, Wyoming, USA, September.
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Mary McDonald / Brown bear (Ursus arctos) female on river bank, Geographic Harbor, coastal Katmai National Park, south west Alaska, USA, south west Alaska, USA, August.
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Mary McDonald / Brown bear (Ursus arctos) female on river bank, Geographic Harbor, coastal Katmai National Park, south west Alaska, USA, south west Alaska, USA, August.
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Mary McDonald / Brown bear (Ursus arctos) female by river to fish for salmon, Geographic Harbor, coastal Katmai National Park, south west Alaska, USA, August.
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Oriol Alamany / Termite mounds in Eucalyptus savannah, Mary River, Kakadu National Park, Northern Territory, Australia, November
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Mary McDonald / American bison {Bison bison} swimming across river in Yellowstone NP, Arizona, USA.
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Mary McDonald / American bison {Bison bison} standing in river, Yellowstone NP, Arizona, USA.
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Mary McDonald / American bison {Bison bison} adults and young swimming across river in Yellowstone NP, Arizona, USA.
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Steven David Miller / Frilled Lizard {Chlamydosaurus kingii} Mary River National Park, Cobourg Peninsula, Northern Territory, Australia
