A mule is a hybrid animal resulting from the breeding of a male donkey, known as a jack, and a female horse, called a mare. Mules are known for their strength, endurance, and sure-footedness, making them valuable working animals in various environments, especially in agriculture and transportation. Mules inherit desirable traits from both parent species, such as the intelligence and stamina of donkeys and the size and speed of horses. They are often used as pack animals in mountainous regions and are recognized for their unique characteristics, including their long ears and distinctive braying sound.