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Male bison standing by Firehole River in Upper geyser basin, Yellowstone National Park, Wyoming Royalty Free Stock Photo

Bison at Upper Geyser Basin, Yellowstone National Park, Wyoming Royalty Free Stock Photo

Wild bison or American buffalo in Upper Geyser Basin, Yellowstone National Park Royalty Free Stock Photo

Bison or buffalo grazing in Upper Geyser Basin, Yellowstone National Park Royalty Free Stock Photo

Wild bison or American buffalo walking in Upper Geyser Basin, Ye Royalty Free Stock Photo

Bison or American buffalo in Upper Geyser Basin in Yellowstone N Royalty Free Stock Photo

Bison at Upper Geyser Basin, Yellowstone National Park, Wyoming

Bisons at Upper Geyser Basin near Old Faithful, Yellowstone National Park, Wyoming, USA Royalty Free Stock Photo

Spasmodic Geyser in Upper Geyser Basin, Yellowstone National Park, Wyoming Royalty Free Stock Photo

Yellowstone National Park Upper Geyser Basin. Royalty Free Stock Photo

Panorama of grazing bison in Upper Geyser Basin, Yellowstone Nat Royalty Free Stock Photo

YELLOWSTONE NATIONAL PARK, WYOMING - JUNE 9, 2017: Green Spring of the Emerald Group in the Black Sand Basin in Upper Geyser Basin Royalty Free Stock Photo

Bison Bison bison eating next to Firehole River in the Upper Geyser Basin, Yellowstone National Park Royalty Free Stock Photo

Solitary bison grazing in the wild near the shore of Firehole River in the Upper Geyser Basin of Yellowstone National Park Royalty Free Stock Photo

Bison, bison bison, approaching near Old Faithful Geyser at the Upper Geyser Basin, UNESCO Natural World Heritage Site, Yellowstone National Park, Wyoming, USA.