american plains bison bull walking in the yellowstone river shallows

americanplainsbison americanbison bison buffalo americanbuffalo bovine wildlife animal mammal mammals animals northamericanwildlife northamericananimal northamericanmammal northamericanbovine big strong dangerous biganimal bigwildlife bigmammal bigbovine stronganimal strongmammal strongwildlife strongbovine herdanimal herdwildlife herdmammal herdbovine socialwildlife socialanimal socialmammal socialbovine groupwildlife groupanimal groupmammal groupbovine bisonbisonbison herbivore herbivorous herbivorousanimal herbivorouswildlife herbivorousmammal prey preyanimal grazer grazingwildlife grazinganimal grazingmammal migratory migratoryanimal migratorywildlife migratorymammal hornedanimal hornedmammal hornedwildlife yellowstonewildlife yellowstoneanimal yellowstonemammal yellowstonebovine yellowstonenationalpark behavior bisonbehavior animalbehavior bisonbull malebison americannationalmammal