A male donkey or ass is called a jack, a female a jenny or jennet;[3][4][5] a young donkey is a foal.[5] Jack donkeys are often used to produce mules.
Asses were first domesticated around 3000 BC,[6] or 4000 BC, probably in Egypt or Mesopotamia,[7] and have spread around the world. They continue to fill important roles in many places today. While domesticated species are increasing in numbers, the African wild ass and another relative, the Onager, are endangered. As beasts of burden and companions, asses and donkeys have worked together with humans for millennia.
Traditionally, the scientific name for the donkey is Equus asinus asinus based on the principle of priority used for scientific names of animals. However, the International Commission on Zoological Nomenclature ruled in 2003 that if the domestic species and the wild species are considered subspecies of each other, the scientific name of the wild species has priority, even when that subspecies was described after the domestic subspecies.[2] This means that the proper scientific name for the donkey is Equus africanus asinus when it is considered a subspecies, and Equus asinus when it is considered a species.
At one time, the synonym ass was the more common term for the donkey, as in jackass, meaning "male donkey". The first recorded use of donkey was in 1784[8][9] or 1785.[10][11] While the word ass has cognates in most other Indo-European languages,