A male donkey is called a jack. These animals are known for their strong build and endurance, making them valuable for work in agriculture and transportation. Jacks typically have a braying sound that is distinct and can be heard from a distance. Male donkeys can be found in various breeds, each with unique characteristics. They are often used for breeding purposes, as they can mate with female donkeys, known as jennets, to produce mules when bred with horses. Mules inherit traits from both parents, making them strong and versatile animals.