Rodeo is a sport which arose out of the working practices of cattle herding in Spain, Mexico, and later the United States, Canada, South America and Australia. 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 consists of events that involve horses and other livestock, designed to test the skill and speed of the human cowboy and cowgirl athletes who participate. Professional rodeos generally comprises the following events: tie-down roping, team roping, steer wrestling, saddle bronc riding, bareback bronc riding, bull riding and barrel racing.