Donkeys live a long time. None of you has ever seen a dead donkey.
A mule is the offspring of a male donkey (jack) and a female horse (mare). The mule is valued because, it is stronger than a horse of similar size and inherits the endurance and disposition of the donkey tending to require less food than a horse of similar size. This makes them valuable especially in regions with scarce vegetation.
This reflects in the map. Mules are most popular in Central and South America, Asia and Africa. Most mules live in Mexico, followed by China, Brazil and Ethiopia.
