"La potra zaina" is a traditional Spanish folk song that tells the story of a beautiful mare. The song is often associated with the Andalusian region and reflects the cultural significance of horses in Spanish folklore. It captures the admiration and affection people have for these animals, often symbolizing freedom and grace. The song is typically performed in a lively manner, accompanied by traditional instruments such as the guitar and castanets. It is popular at festivals and celebrations, showcasing the rich musical heritage of Spain and the importance of equestrian culture in its history.