A mare is an adult female horse, typically over the age of three. Mares are known for their nurturing behavior, especially when they give birth to foals. They can be found in various breeds, each with unique characteristics and abilities, such as Thoroughbreds for racing or Arabians for endurance. Mares usually have a reproductive cycle that lasts about 21 days, during which they can become pregnant. They are often used in various equestrian activities, including riding, showing, and working on farms. Proper care and management are essential for their health and well-being.