His job is to direct the yoke of oxen that pulls his cart. From the time they're just children, they are taught the difficult tradition of training the animals so that the oxen can handle the weight of the yoke and work as a team. When the youngsters become experts, they are known as boyeros, or oxcart drivers.
Patiently, the boyero shapes the personalities of his oxen. He uses his prod to help show the beasts who's boss. After a while, the oxen obey, and driver, cart and oxen become one.
He has many functions. It could be plowing; transporting sugarcane, coffee, or corn; or working the sugar mill. The boyero's labor is an important aspect of Costa Rica's rural traditions and identity.
An essential aspect of this World Intangible Heritage (as designated by UNESCO) is the unique decoration that local artists have given the oxcarts, making this utilitarian piece of equipment a work of art.
Today, the boyero's labor is an invaluable cultural expression that reflects a past rich in traditions and continues to be an important part of the Costa Rican identity.