Have you ever heard the term “mule” and wondered how they’re made? The answer lies in the fascinating process of crossbreeding a male donkey and a female horse.
Let’s break it down clearly and respectfully.

What Happens When a Donkey Mates with a Mare?
- Male donkey (called a jack) + Female horse (called a mare) = Mule
Mules are hybrid animals, meaning they come from two different species. In this case:
- The donkey (Equus asinus) and
- The horse (Equus caballus)
Though they are closely related, their offspring—the mule—inherits a mix of both parents’ traits.
Why Breed a Donkey with a Mare?
Mules are bred for their unique advantages:
- Strength and stamina (from the horse)
- Sure-footedness and resilience (from the donkey)
- Calm and intelligent nature
- Low-maintenance and hardy
That’s why mules are popular in agriculture, travel, and mountainous terrain worldwide.
Can Mules Reproduce?
Almost always, no. Mules are sterile, meaning they can’t produce offspring of their own. This happens because donkeys and horses have a different number of chromosomes:
- Horse: 64
- Donkey: 62
- Mule: 63 (uneven = infertile)
Male vs Female Crosses
There are two possible crosses, but only one is common:
Male Parent | Female Parent | Offspring | Common Name | Fertile? |
---|---|---|---|---|
Donkey (Jack) | Horse (Mare) | Mule | Mule | No |
Horse (Stallion) | Donkey (Jenny) | Hinny | Hinny | Rare |
Hinny is less common due to differences in size and behavior.
Summary
- A donkey mating with a mare produces a mule.
- Mules are strong, smart, and hardworking hybrids.
- They can’t reproduce, but they’re incredibly valuable working animals.
FAQs
What is a female mule called?
A female mule is called a molly.
Can you breed two mules?
No, mules are sterile and can’t breed with each other.
Are mules stronger than horses?
Mules are generally more durable and hardy, though not necessarily stronger than the largest horse breeds.