A stallion is an uncastrated male horse, typically used for breeding purposes. Stallions are known for their strength, agility, and distinctive physical features, such as a muscular build and a thick mane. They often exhibit more aggressive behavior compared to geldings (castrated males) and mares (female horses), especially during mating season. Stallions can be found in various horse breeds, including Thoroughbreds, Arabians, and Quarter Horses. They are often trained for specific disciplines, such as racing, dressage, or show jumping. Proper handling and training are essential to manage their temperament and ensure safety around other horses and humans.