Wind Cave bison herd are of which subspecies of the Americaon bison?
Wind Cave bison herd:  The Wind Cave herd are of the Plains bison subspecies ("Bison bison bison"). Plains bison: The Plains bison ("Bison bison bison") is one of two subspecies/ecotypes of the American bison, the other being the wood bison ("B. b. athabascae").
Plains bison