The Donkey Sanctuary has produced this guide to explain some of the following donkey definitions and donkey terms.
Colt: A colt is a young male donkey less than four years of age.
Filly: A filly is a young female donkey less than four years of age.
Foal: A foal is a baby male or female donkey up to one year old.
Gelding: A castrated male donkey.
Mare: A female donkey.
Rig: A rig is an entire male donkey with no signs of external testicles.
Stallion: A stallion is a male donkey that has not been gelded (castrated).
Yearling: A yearling is a young male or female donkey between one and two years of age.
Asino: An asino is the Italian word for donkey.
Ass: An ass is either a male or female donkey.
Burro: A burro is the Spanish word for donkey.
Hinny: A hinny is the result of breeding between a female donkey and a male horse.
Jack: A jack is a term for a male donkey.
Jenny: A jenny (or jennet) is a term for a female donkey.
Moke: A moke is a British term for a donkey.
Molly: A molly is a term for a female mule.
Mule: A mule is the result of breeding between a male donkey and a female horse.