The Clydesdale is a breed of draught horse derived from the farm horses of Clydesdale, Scotland, and named after that region. Although originally one of the smaller breeds of draught horses, it is now a tall breed. Often bay in colour, they show significant white markings due to the presence of sabino genetics. The breed was originally used for agriculture and haulage, and is still used for draught purposes today. The Budweiser Clydesdales are some of the most famous Clydesdales, and other members of the breed are used as drum horses by the British Household Cavalry. They have also been used to create and improve other draught breeds.
The horse is one of two extant subspecies of ''Equus ferus''. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today. Humans began to domesticate horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC.