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epending on breed, management and environment, the domestic horse today has a life expectancy of 25 to 30 years. It is uncommon, but a few horses live into their 40s, and, occasionally, beyond. The oldest verifiable record was "Old Billy," a horse that lived in the 19th century to the age of 62. In modern times, Sugar Puff, who had been listed in the Guinness Book of World Records as the world's oldest then-living pony, died at age 56. Light riding horses such as Arabians, Morgans, or Quarter Horses usually range in height from 14.0 to 16.0 hands and can weigh from to . Larger riding horses such as Thoroughbreds, American Saddlebreds or Warmbloods usually start at about 15.2 hands and often are as tall as 17 hands weighing from to . Heavy or draft horses such as the Clydesdale, Belgian, Percheron, and Shire are usually at least 16.0 to 18.0 hands high and can weigh from about to . While ponies cannot be taller than 14.2h (147 cm), they may be much smaller, down to the Shetland pony at around 10 hands and the Falabella which can be no taller than , the size of a medium-sized dog. However, while many miniature horse breeds are small as or smaller than a Shetland pony, because they are bred to have a horse phenotype (appearance), their breeders and registries classify them as very small horses rather than ponies. The most widely known use of horses for sport is horse racing, seen in almost every nation in the world. There are three types: "flat" racing; steeplechasing, i.e. racing over jumps; and harness racing, where horses trot or pace while pulling a driver in a small, light cart known as a sulky. Most race horses in the developed world are Thoroughbreds, a breed which can reach speeds up to . In the case of a specialized sprinting breed, the American Quarter Horse, speeds over have been clocked. In harness racing, performed by Standardbred horses, speeds over have been measured. A major part of the economic importance of horse racing, as for many sports, lies in the gambling associated with it. Sports such as polo and horseball do not judge the horse itself, but rather use the horse as a partner for human competitors as a necessary part of the game. Although the horse assists this process and requires specialized training to do so, the details of its performance are not judged, only the result of the rider's actions -- be it getting a ball through a goal or some other achievement. Examples of these sports of partnership between human and animal also include jousting (reenacting the skills used by medieval knights), where the main goal is for one rider to dismount the other, and buzkashi, a team game played throughout Central Asia, the aim being to capture a goat carcass while on horseback. Colt: a male horse under the age of four. A common terminology error is to call any young horse a colt, when the term actually only refers to young male horses. The following terminology is used to describe horses of various ages: The English-speaking world measures the height of horses in hands, abbreviated "h" or "hh," and is measured at the highest point of an animal's withers. One hand is . Intermediate heights are defined by hands and inches, rounding to the lower measurement in hands, followed by a decimal point and the number of additional inches between 1 and 3. Thus a horse described as 15.2 hh tall, means it is 15 hands, 2 inches, or in height.
The English-speaking world measures the height of horses in hands, abbreviated "h" or "hh," and is measured at the highest point of an animal's withers. One hand is . Intermediate heights are defined by hands and inches, rounding to the lower measurement in hands, followed by a decimal point and the number of additional inches between 1 and 3. Thus a horse described as 15.2 hh tall, means it is 15 hands, 2 inches, or in height. The horse (Equus caballus) is a large odd-toed ungulate mammal, one of ten living species of the family Equidae.
Horses are trained to be ridden or driven in many different sporting events and competitions. Examples include horse shows, gymkhana and O-Mok-See, rodeos, endurance riding, fox hunting, and Olympic-level events such as three-day eventing, combined driving, dressage, and show jumping. Although scoring varies by event, most emphasize the horse's speed, maneuverability, obedience and/or precision. Sometimes the equitation, the style and ability of the rider, is also considered. For centuries horses have been one of the most economically important domesticated animals, especially relied upon for farmwork and for transportation. Their importance declined following the introduction of mechanization. The history of the horse is prominent in religion, mythology, art, transportation, agriculture, and warfare. The difference between a horse and pony is not simply a height difference, but also a difference in phenotype or appearance. There are noticeable differences in conformation and temperament. Ponies often exhibit thicker manes, tails and overall coat. They also have proportionally shorter legs, wider barrels, heavier bone, shorter and thicker necks, and short heads with broad foreheads. They often have calmer temperaments than horses and also a high level of
equine intelligence that may or may not be used to cooperate with human handlers. During Roman times the Gauls and other Europeans used horses of the heavy, northern type for pulling loads and other work. In the Middle Ages huge draft animals, over 16 hands (64 in./160 cm) high, were bred to carry armored knights as well as their own armor. As cavalry warfare declined, such medieval inventions as the horseshoe and the rigid horse-collar (see harness) made draft horses more useful for work. By the 19th cent. the draft horse had replaced the ox in N Europe and North America. Draft breeds common in the United States were the Belgian, the Clydesdale, the Percheron; and the Shire, also the most common draft horse in England.