You are wrong Bull riding jaripeo and bull tailing Coler originated in the bull rings of colonial Mexico They were later adopted by the Charros and only later by vaqueros  See the following Guarner Enrique Historia del Torreo en Mexico Mexico Editorial Diana  Historical Synthesis of CharreriaArtes de Mexico   Steiner Stan Dark  Dashing Horsemen Harper  Row  Slatta Richard Cowboys of the Americas Yalre University Press   For a detailed discussion of the evoluation from bullgiht to Charreria to rodeo see mary lou Lecompte The Hispsnic Influence on the History of Rodeo Journal of Sport History Spring