Rodeo is a competitive sport that arose out of the working practices of cattle herding in Spain, Mexico, and later Central America, the United States, Canada, South America, Australia and New Zealand. It was based on the skills required of the working vaqueros and later, cowboys, in what today is the western United States, western Canada, and northern Mexico. Today it is a sporting event that involves horses and other livestock, designed to test the skill and speed of the cowboys and cowgirls. American style professional rodeos generally comprise the following events: tie-down roping, team roping, steer wrestling, saddle bronc riding, bareback bronc riding, bull riding and barrel racing. The events are divided into two basic categories: the rough stock events and the timed events. Depending on sanctioning organization and region, other events such as breakaway roping, goat tying, or pole bending may also be a part of some rodeos.