• Working asses in more developed countries live longer than in poorer ones. In developed countries, their lifespan may range from 30 to 50 years.

The species typically lives from 35 years and 3 months to 58 years and 10 months, with a maximum lifespan of 50 years, although the theoretical lifespan ranges from 15 years and 1 month to 48 years and 11 months. The age of sexual maturity is from 2 years and 5 months to 3 years, and the young are born with their eyes open and begin to walk immediately. During the embryonic stage, the fetus develops inside the mother, followed by the young stage where a foal feeds on its mother's milk and quickly learns to walk, lasting from 6 months to 1 year. The adult stage begins when the species is capable of reproduction and performing work, and lasts from 1 to 50 years.