A female horse is called a mare. Mares are typically mature female horses that are over three years old. They are known for their strength, agility, and gentle nature. Mares can be used for various purposes, including riding, racing, and working on farms. Mares usually give birth to a baby horse, known as a foal, after a gestation period of about 11 months. They are often protective and nurturing mothers. In addition to their maternal role, mares can also participate in competitive events and are valued for their skills in various equestrian disciplines.