Nick Garbutt / American bison (Bison bison) female covered in hoar frost near hot spring, portrait. Midway Geyser Basin, Yellowstone National Park, USA. February.
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Danny Green / Bison (Bison bison) herd walking in line in snow, Yellowstone National Park, Wyoming, USA, February
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Nick Garbutt / Herd of American bison (Bison bison) in snow, Yellowstone National Park, Wyoming, Yellowstone, January.
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Edwin Giesbers / European bisons (Bison bonasus) fighting, Zuid-Kennemerland National Park, the Netherlands. Reintroduced species.
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Edwin Giesbers / European bisons (Bison bonasus) fighting, Zuid-Kennemerland National Park, the Netherlands. Reintroduced species.
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Edwin Giesbers / European bisons(Bison bonasus) fighting, Zuid-Kennemerland National Park, the Netherlands. Reintroduced species.
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Jouan Rius / Bisons (Bison bison), Antelope Island State Park, Great Salt Lake, Utah, USA, March 2014.
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Ingo Arndt / American bisons (Bison bison) Grand Teton National Park, Wyoming, USA, September.
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Danny Green / Bison (Bison bison) close up head portrait, Yellowstone National Park, USA, February
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Danny Green / Bison (Bison bison) herd walking in snow, Yellowstone National Park, Wyoming, USA, February
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Danny Green / Bison (Bison bison) single animal in snow, Yellowstone National Park, Wyoming, USA, February
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Inaki Relanzon / RF - American bisons (Bison bison) in Grand Teton National Park. winter. Wyoming, USA. (This image may be licensed either as rights managed or royalty free.)