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Herd of Bisons in Hayden Valley of Yellowstone NP  (American Bison) - 509928-BS1 Bison bison - Photo: ©Pierre Vernay - Biosphoto Click a keyword below to search for other images america american bison american bison bison bison american bisons americans bisons artiodactyla august biodiversities biodiversity biodiversity management bioiversity managements biological diversity biological diversity managements bovidae cattle bovidae cattles bovidae continent continental area count counting description descriptions ecosystem ecosystems enumeration enumerations environment environment management environment protection environment protections environmental managements environments even-toed ungulate forest forests group groups herbivora mammal herbivore mammal herbivores mammal herd flock herds flocks iucn iucn red list of threatened species iucn status landmass landmasses large prairie large prairies localisation localization location low formation low formations low risk iucn lr mammal month of year months of year national park national parks natural area natural areas nature nature management near threatened species iucn nt new world north america sensitive natural areas silhouette silhouettes species time scale time scales u.s.a. uicn unesco's world heritage list unesco's world heritage sites ungulate united states united states of america usa wild animal wild animals wild fauna wild faunae world heritage site yellowstone national park horizontal pierre