Bronco, or bronc, is a term use in the United States and Canada to refer to an untrained horse or one that habitually bucks. It may refer to a feral horse that has lived in the wild its entire life, but is also used to refer to domestic horses not yet fully trained to saddle, and hence prone to unpredictable behavior, particularly bucking. The term also refers to bucking horses used in rodeo "rough stock" events, such as bareback bronc riding and saddle bronc riding. The silouette of a cowboy on a bucking bronco is the official symbol for the State of Wyoming.